The temperature sensitivity of laser threshold current in single mode, wavelength tunable, InGaAsP bulk active region semiconductor lasers diodes is measured in the temperature range, 293 K≲T≲355 K and wavelength range 1.23 μm≲λ≲1.35 μm. When proper account is taken of peak gain variation with temperature, the temperature dependence of laser threshold current (parameterized by T0) is insensitive to lasing wavelength over a wide tuning range.
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O’Gorman et al. (1993) studied this question.
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