Wavelength dependence of T0 in InGaAsP semiconductor laser diodes

Abstract
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.