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Conferences > CLEO > 1990 > CTUG > CTUG4
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1990),
  • paper CTUG4

Optimizing net gain in photorefractive InP:Fe without an applied field

J. STRAIT, J. D. REED, and A. SAUNDERS

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Abstract

Recently we observed a two-beam coupling gain (0.194 cm−1) that exceeds absorption (0.145 cm−1) in InP:Fe at λ = 1.32 μm without applying an external field.1 Measurements of gain coefficient as a function of grating spacing fit the photorefractive theory for simultaneous electron-hole transport.2-4 Figure 1 shows the data and fit, where the effective density of traps Ne- Nn/Np/(Nn + Np) = (2.1 ± 0.4) × 1015 cm−3 and ξ, the factor that accounts for competition between electrons and holes, equals −0.70 ± 0.6.

© 1990 Optical Society of America

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