High-power wavelength stabilized 970 nm tilted cavity laser with a 41.3 dB side mode suppression ratio

摘要

We studied wavelength stabilized all-epitaxial 970 nm spectral range GaAs/GaAlAs tilted cavity lasers (TCLs). Single transverse mode edge-emitting 4-μm-wide ridge lasers demonstrated spatial and spectral single mode continuous wave operation with a longitudinal side mode suppression ratio up to 41.3 dB. Small signal modulation bandwidth of 3 GHz with a resonance peak of 6 dB at the relaxation oscillation frequency was measured for a 870 μm long device. TCL modulation efficiency is 0.36 GHz/(mA)~(1/2).S-parameter measurements indicate that much higher frequencies may be expected in case of more advanced processing and/or shorter cavity lengths.