Test results of a diffraction grating beam combiner

Details Test results of a diffraction grating beam combiner Test results of a diffraction grating beam combiner

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1218..264r&link_type=abstract

IN: Free-space laser communication technologies II; Proceedings of the Meeting, Los Angeles, CA, Jan. 15-17, 1990 (A91-22776 08-

Computer Science

Aluminum Gallium Arsenides, Gratings (Spectra), Laser Beams, Optical Communication, Semiconductor Lasers, Collimation, Frequency Stability, Temperature Control

Scientific paper

A laser diode beam combiner employing diffraction gratings has been fabricated and tested. The Grating Laser Beam Combiner (GLBC) uses two holographic diffraction gratings to incoherently combine the first order diffraction components of four 35 mW AlGaAs lasers. The grating rhomb design minimizes the transmitter sensitivity to the inherent frequency instability of laser diodes. The overall throughput of the combiner is 74 percent. Each laser was temperature controlled to 0.1 C and modulated with 110 Mbps QPPM data. Two lasers under modulation were coaligned to within 76 microrad with a combined average power of 45 mW.

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