Abstract
Single-longitudinal-mode end-emitting laser with 10 periods of metal slots at around 956nm has been fabricated. 100μm wide broad-stripe and ten periods of 9.5μm periodicity metal slots are defined by i-line lithography and dry etching. Experimentally, continuous-wave power of 213mW has achieved, at a slope efficiency of 520mW/A, having a 3dB spectrum width of less than 0.04nm at 900mA, and operating in a stable single longitudinal mode with the side-mode suppression ratio (SMSR) of 42dB. We prove that metal slots introduce sufficient loss into the cavity to filter out the wanted mode, and is more efficient on our chip structure than traditional slot laser. This paper provides a new method for the realizing high power broad-stripe (~100μm) laser and array with single longitudinal mode operation.
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