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Using new small-signal analytic relations, the linewidth, amplitude fluctuations, main-mode transient response and photon-electron ringing frequency are presented for a laser with fixed active length and variable-length passive region joined with negligible reflection. With 150 μm active length and 1000 μm total length, a linewidth below 1 MHz is achievable at 5 mW output.
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Stewart E. Miller (1986) studied this question.
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