A new 1.55 μm wavelength GaInAsP laser is described: the multisection ridge laser. Pulsed thresholds were typically 40–80 mA. CW thresholds were comparable. The lowest measured CW threshold was 38 mA at 12°C. The laser operated stably in a single longitudinal mode (spurious modes down by −16 dB) under fast pulse modulation with a prebias below threshold. Theoretical results based on a waveguide scattering theory are in qualitative agreement with the experimental results.
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Bowers et al. (1983) studied this question.
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