Effects of liquid crystals on diffractive coupling in a diode laser external cavity

J. Michael Finlan; Scott M. Hamilton; James R. Leger

doi:10.1117/12.18275

1 May 1990 Effects of liquid crystals on diffractive coupling in a diode laser external cavity

J. Michael Finlan, Scott M. Hamilton, James R. Leger

Proceedings Volume 1219, Laser Diode Technology and Applications II; (1990) https://doi.org/10.1117/12.18275
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

A seven-element gain-guided AlGaAs diode laser array is used to establish an external cavity which relies on weak diffractive coupling for its operation. Collimation of the lasers is achieved using a binary-optics microlens array. A nematic liquid crystal phase modulator is placed in the image plane of the lenslet array to provide individual phase control of each laser stripe. It is shown that the liquid crystal phase modulator is capable of establishing partial coherence by independent adjustment of the laser optical path lengths.

Citation Download Citation

J. Michael Finlan, Scott M. Hamilton, and James R. Leger "Effects of liquid crystals on diffractive coupling in a diode laser external cavity", Proc. SPIE 1219, Laser Diode Technology and Applications II, (1 May 1990); https://doi.org/10.1117/12.18275

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