Abstract

We propose an effective and promising method to extend the continuous range of the optical delay line in white light interferometry. The method adopts the combination of switchable fixed delays and a continuous-scanning stage laid in one arm of the interferometer. Moreover, a fiber ring constructed by a fiber coupler is employed in the other arm to achieve self-calibration and improve the delay precision, voiding the use of a specialized measurement instrument. The range-extension method maintains the original performances of the stage just through the process of orderly copying and jointing. The setup with 16 parallel fixed delay paths is experimentally demonstrated. The insertion loss of the optical delay line will not increase as the range extension and keeps an average of 1.45 dB with a fluctuation of ±0.15  dB (3σ) over a delay range of 37.2 m without a blind zone. In addition, the delay precision as a function of the port number of the optical switch does not deteriorate and remains at a level of 10.21 μm with a standard deviation of 0.08 μm. The loss and delay precision features enable the proposed structure to be extended without limitation, which is particularly significant for practical applications.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Rangeability extension of fiber-optic low-coherence measurement based on cascaded multistage fiber delay line

Shuguang Li, Xinwan Li, Weiwen Zou, and Jianping Chen
Appl. Opt. 51(6) 771-775 (2012)

Continuously tunable ultra-thin silicon waveguide optical delay line

Xinyi Wang, Linjie Zhou, Ruifei Li, Jingya Xie, Liangjun Lu, Kan Wu, and Jianping Chen
Optica 4(5) 507-515 (2017)

Multiplexed fiber Fabry–Perot temperature sensor system using white-light interferometry

Yichao Chen and Henry F. Taylor
Opt. Lett. 27(11) 903-905 (2002)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (16)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription