Abstract

We demonstrate a narrow-linewidth, low-intensity noise, widely wavelength-tunable LD for which we adopted a long external cavity configuration (ECLD) with a tunable optical filter. By employing a simultaneous tuning circuit between the optical filter and the Fabry-Perot mode caused by the external cavity, the oscillation wavelength was successfully tuned over the full C-band without mode hopping. The tunable optical filter bandwidth was 0.55 nm (1530~1570 nm). We achieved a linewidth of less than 8 kHz obtained with a delayed self-heterodyne method. On the other hand, the linewidth estimated from the white noise level of the optical frequency modulation noise power spectrum of the laser output was as narrow as 314 Hz. A relative intensity noise (RIN) below −130 dB/Hz was simultaneously achieved over the C-band range. With the same configuration except for an optical filter with a filter bandwidth of 0.6 nm for L-band operation (1570~1610 nm), we also realized a full L-band wavelength tunable ECLD with a linewidth of less than 7.7 kHz and a RIN of below −126 dB/Hz.

© 2017 Optical Society of America

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References

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    [Crossref]
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    [Crossref]
  3. S. Beppu, K. Kasai, M. Yoshida, and M. Nakazawa, “2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/Hz,” Opt. Express 23(4), 4960–4969 (2015).
    [Crossref] [PubMed]
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    [Crossref] [PubMed]
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2015 (1)

2014 (1)

2012 (3)

2009 (1)

H. Ishii, K. Kasaya, and H. Oohashi, “Spectral linewidth reduction in widely wavelength tunable DFB laser array,” IEEE J. Sel. Top. Quantum Electron. 15(3), 514–520 (2009).
[Crossref]

1995 (1)

K. Petermann, “External optical feedback phenomena in semiconductor lasers,” IEEE J. Sel. Top. Quantum Electron. 1(2), 480–489 (1995).
[Crossref]

1982 (1)

D. Welford and A. Mooradian, “Output power and temperature dependence of the linewidth of single-frequency cw (GaAl)As diode lasers,” Appl. Phys. Lett. 40(10), 865–867 (1982).
[Crossref]

1980 (2)

R. Lang and K. Kobayashi, “External optical feedback effects on semiconductor injection laser properties,” IEEE J. Quantum Electron. 16(3), 347–355 (1980).
[Crossref]

T. Okoshi, K. Kikuchi, and A. Nakayama, “Novel method for high resolution measurement of laser output spectrum,” Electron. Lett. 16(16), 630–631 (1980).
[Crossref]

Bajwa, S.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Bao, Y. J.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Barry, L. P.

Bennetts, S.

Beppu, S.

Bhardwaj, A.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Close, J. D.

Debs, J. E.

Endo, T.

K. Kasai, M. Nakazawa, Y. Tomomatsu, and T. Endo, “Full C-band, mode-hop-free wavelength-tunable laser diode with a linewidth of 8 kHz and a RIN of −130 dB/Hz,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2017), paper W1E.2.
[Crossref]

Feng, Y.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Fu, Y.

Fujiwara, N.

H. Ishii, N. Fujiwara, K. Watanabe, S. Kanazawa, M. Itoh, H. Takenouchi, and Y. Miyamoto, “Narrow linewidth operation (<10 kHz) in self-injection-locked tunable DFB LD array (SIL-TLA) integrated with optical feedback planar lightwave circuit (PLC),” in Proceedings of European Conference on Optical Communication (IEEE, 2016), paper Tu.2.E.5.

Hardman, K. S.

Hu, Q.

Hu, S.

Huang, X. D.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Huynh, T. N.

Ishihara, K.

A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2012), paper PDP5C.3.
[Crossref]

Ishii, H.

H. Ishii, K. Kasaya, and H. Oohashi, “Spectral linewidth reduction in widely wavelength tunable DFB laser array,” IEEE J. Sel. Top. Quantum Electron. 15(3), 514–520 (2009).
[Crossref]

K. Kasai, M. Nakazawa, M. Ishikawa, and H. Ishii, “An 8 kHz linewidth, 50 mW output wavelength tunable DFB LD array over the C-band with self optical feedback,” in Proceedings of Conference on Lasers and Electro-Optics (Optical Society of America, 2016), paper SW4M.2.
[Crossref]

H. Ishii, N. Fujiwara, K. Watanabe, S. Kanazawa, M. Itoh, H. Takenouchi, and Y. Miyamoto, “Narrow linewidth operation (<10 kHz) in self-injection-locked tunable DFB LD array (SIL-TLA) integrated with optical feedback planar lightwave circuit (PLC),” in Proceedings of European Conference on Optical Communication (IEEE, 2016), paper Tu.2.E.5.

Ishikawa, M.

K. Kasai, M. Nakazawa, M. Ishikawa, and H. Ishii, “An 8 kHz linewidth, 50 mW output wavelength tunable DFB LD array over the C-band with self optical feedback,” in Proceedings of Conference on Lasers and Electro-Optics (Optical Society of America, 2016), paper SW4M.2.
[Crossref]

Itoh, M.

H. Ishii, N. Fujiwara, K. Watanabe, S. Kanazawa, M. Itoh, H. Takenouchi, and Y. Miyamoto, “Narrow linewidth operation (<10 kHz) in self-injection-locked tunable DFB LD array (SIL-TLA) integrated with optical feedback planar lightwave circuit (PLC),” in Proceedings of European Conference on Optical Communication (IEEE, 2016), paper Tu.2.E.5.

Ji, H. Y.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Kanazawa, S.

H. Ishii, N. Fujiwara, K. Watanabe, S. Kanazawa, M. Itoh, H. Takenouchi, and Y. Miyamoto, “Narrow linewidth operation (<10 kHz) in self-injection-locked tunable DFB LD array (SIL-TLA) integrated with optical feedback planar lightwave circuit (PLC),” in Proceedings of European Conference on Optical Communication (IEEE, 2016), paper Tu.2.E.5.

Kasai, K.

S. Beppu, K. Kasai, M. Yoshida, and M. Nakazawa, “2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/Hz,” Opt. Express 23(4), 4960–4969 (2015).
[Crossref] [PubMed]

K. Kasai, M. Nakazawa, M. Ishikawa, and H. Ishii, “An 8 kHz linewidth, 50 mW output wavelength tunable DFB LD array over the C-band with self optical feedback,” in Proceedings of Conference on Lasers and Electro-Optics (Optical Society of America, 2016), paper SW4M.2.
[Crossref]

K. Kasai, M. Nakazawa, Y. Tomomatsu, and T. Endo, “Full C-band, mode-hop-free wavelength-tunable laser diode with a linewidth of 8 kHz and a RIN of −130 dB/Hz,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2017), paper W1E.2.
[Crossref]

Kasaya, K.

H. Ishii, K. Kasaya, and H. Oohashi, “Spectral linewidth reduction in widely wavelength tunable DFB laser array,” IEEE J. Sel. Top. Quantum Electron. 15(3), 514–520 (2009).
[Crossref]

Kawakami, H.

A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2012), paper PDP5C.3.
[Crossref]

Kikuchi, K.

T. Okoshi, K. Kikuchi, and A. Nakayama, “Novel method for high resolution measurement of laser output spectrum,” Electron. Lett. 16(16), 630–631 (1980).
[Crossref]

Kobayashi, K.

R. Lang and K. Kobayashi, “External optical feedback effects on semiconductor injection laser properties,” IEEE J. Quantum Electron. 16(3), 347–355 (1980).
[Crossref]

Kobayashi, T.

A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2012), paper PDP5C.3.
[Crossref]

Koh, P. C.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Kuhn, C. C.

Kutty, S.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Lang, R.

R. Lang and K. Kobayashi, “External optical feedback effects on semiconductor injection laser properties,” IEEE J. Quantum Electron. 16(3), 347–355 (1980).
[Crossref]

Larson, M. C.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Li, C.

Li, Z. M.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Liu, N.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Liu, W.

Luo, M.

Lv, C. W.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Masuda, H.

A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2012), paper PDP5C.3.
[Crossref]

Matsuura, A.

A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2012), paper PDP5C.3.
[Crossref]

McDonald, G. D.

Miyamoto, Y.

H. Ishii, N. Fujiwara, K. Watanabe, S. Kanazawa, M. Itoh, H. Takenouchi, and Y. Miyamoto, “Narrow linewidth operation (<10 kHz) in self-injection-locked tunable DFB LD array (SIL-TLA) integrated with optical feedback planar lightwave circuit (PLC),” in Proceedings of European Conference on Optical Communication (IEEE, 2016), paper Tu.2.E.5.

A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2012), paper PDP5C.3.
[Crossref]

Moewe, M.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Mooradian, A.

D. Welford and A. Mooradian, “Output power and temperature dependence of the linewidth of single-frequency cw (GaAl)As diode lasers,” Appl. Phys. Lett. 40(10), 865–867 (1982).
[Crossref]

Nakayama, A.

T. Okoshi, K. Kikuchi, and A. Nakayama, “Novel method for high resolution measurement of laser output spectrum,” Electron. Lett. 16(16), 630–631 (1980).
[Crossref]

Nakazawa, M.

S. Beppu, K. Kasai, M. Yoshida, and M. Nakazawa, “2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/Hz,” Opt. Express 23(4), 4960–4969 (2015).
[Crossref] [PubMed]

K. Kasai, M. Nakazawa, M. Ishikawa, and H. Ishii, “An 8 kHz linewidth, 50 mW output wavelength tunable DFB LD array over the C-band with self optical feedback,” in Proceedings of Conference on Lasers and Electro-Optics (Optical Society of America, 2016), paper SW4M.2.
[Crossref]

K. Kasai, M. Nakazawa, Y. Tomomatsu, and T. Endo, “Full C-band, mode-hop-free wavelength-tunable laser diode with a linewidth of 8 kHz and a RIN of −130 dB/Hz,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2017), paper W1E.2.
[Crossref]

Nguyen, L.

Okoshi, T.

T. Okoshi, K. Kikuchi, and A. Nakayama, “Novel method for high resolution measurement of laser output spectrum,” Electron. Lett. 16(16), 630–631 (1980).
[Crossref]

Oohashi, H.

H. Ishii, K. Kasaya, and H. Oohashi, “Spectral linewidth reduction in widely wavelength tunable DFB laser array,” IEEE J. Sel. Top. Quantum Electron. 15(3), 514–520 (2009).
[Crossref]

Patwardhan, A.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Petermann, K.

K. Petermann, “External optical feedback phenomena in semiconductor lasers,” IEEE J. Sel. Top. Quantum Electron. 1(2), 480–489 (1995).
[Crossref]

Petrov, K. P.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

Robins, N. P.

Sano, A.

A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2012), paper PDP5C.3.
[Crossref]

Seimetz, M.

M. Seimetz, “Laser linewidth limitations for optical systems with high-order modulation employing feed forward digital carrier phase estimation,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2008), paper OtuM2.
[Crossref]

Semakov, A.

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

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M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
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Other (8)

M. C. Larson, A. Bhardwaj, W. Xiong, Y. Feng, X. D. Huang, K. P. Petrov, M. Moewe, H. Y. Ji, A. Semakov, C. W. Lv, S. Kutty, A. Patwardhan, N. Liu, Z. M. Li, Y. J. Bao, Z. H. Shen, S. Bajwa, F. H. Zhou, and P. C. Koh, “Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2015), paper M2D.1.
[Crossref]

A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2012), paper PDP5C.3.
[Crossref]

M. Seimetz, “Laser linewidth limitations for optical systems with high-order modulation employing feed forward digital carrier phase estimation,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2008), paper OtuM2.
[Crossref]

K. Kasai, M. Nakazawa, M. Ishikawa, and H. Ishii, “An 8 kHz linewidth, 50 mW output wavelength tunable DFB LD array over the C-band with self optical feedback,” in Proceedings of Conference on Lasers and Electro-Optics (Optical Society of America, 2016), paper SW4M.2.
[Crossref]

H. Ishii, N. Fujiwara, K. Watanabe, S. Kanazawa, M. Itoh, H. Takenouchi, and Y. Miyamoto, “Narrow linewidth operation (<10 kHz) in self-injection-locked tunable DFB LD array (SIL-TLA) integrated with optical feedback planar lightwave circuit (PLC),” in Proceedings of European Conference on Optical Communication (IEEE, 2016), paper Tu.2.E.5.

K. Kasai, M. Nakazawa, Y. Tomomatsu, and T. Endo, “Full C-band, mode-hop-free wavelength-tunable laser diode with a linewidth of 8 kHz and a RIN of −130 dB/Hz,” in Proceedings of Optical Fiber Communication Conference (Optical Society of America, 2017), paper W1E.2.
[Crossref]

H. Venghaus, Wavelength Filters in Fiber Optics (Springer, 2006).

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Figures (15)

Fig. 1
Fig. 1 (a) Configuration of full C-band wavelength tunable LD, (b) photograph of laser structure.
Fig. 2
Fig. 2 Transmission spectrum of wavelength tunable optical filter in C-band.
Fig. 3
Fig. 3 Principle of wavelength tuning operation: (a) coarse tuning using optical filter, (b) fine tuning using SiO2 plate.
Fig. 4
Fig. 4 Output power characteristics of C-band wavelength tunable LD.
Fig. 5
Fig. 5 (a) Optical spectrum of LD operating at 1550 nm (resolution bandwidth: 0.01 nm), (b) heterodyne beat spectrum between the present laser and another single-frequency laser.
Fig. 6
Fig. 6 (a) Superimposed optical spectra for different oscillation wavelengths (resolution bandwidth: 0.01 nm), (b) frequency tuning characteristics at around 1550 nm as a function of the rotation angle of a tunable optical filter
Fig. 7
Fig. 7 Delayed self-heterodyne spectra of the present laser operating at 1550 nm with an SOA current of 180 mA.
Fig. 8
Fig. 8 Linewidth vs. oscillation wavelength.
Fig. 9
Fig. 9 FM noise power spectral density of laser operating at 1550 nm.
Fig. 10
Fig. 10 (a) RIN spectrum of LD operated at 1550 nm, (b) dependence of RIN peak on oscillation wavelength.
Fig. 11
Fig. 11 Output power characteristics of L-band wavelength tunable LD.
Fig. 12
Fig. 12 (a) Superimposed optical spectra for different oscillation wavelengths (resolution bandwidth: 0.01 nm), (b) heterodyne beat spectrum between the present laser and another single-frequency laser.
Fig. 13
Fig. 13 Delayed self-heterodyne spectra of present laser operating at 1590 nm with an SOA current of 170 mA.
Fig. 14
Fig. 14 Linewidth vs. oscillation wavelength.
Fig. 15
Fig. 15 (a) RIN spectrum of LD operated at 1590 nm, (b) dependence of RIN peak on oscillation wavelength.

Equations (3)

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λ ( θ ) = λ 0 1 sin 2 θ n e f f 2
d = d 1 ( n a i r / n s i l i c a ) 2 sin 2 θ
Δ ν = π S F ( f )

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