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Output power vs current of a HR coated -long and -wide DFB laser at different heat sink temperatures between 15 and along with curves at 15 and . The inset shows room temperature single mode emission spectra at various cw injection currents. The spectra are obtained at injection current of in step of .
Single mode cw emission spectra of a DFB laser at for different heat sink temperatures of in steps of . The inset shows the linear tuning characteristics of the wavelength with temperature for the same device.
Threshold current density as a function of heat sink temperature in cw and pulsed modes of a HR coated -long and -wide DFB laser. The solid line is the result of the fit from a usual exponential function, . In pulse mode, is with for temperature range of .
Subthreshold cw emission spectra at with injection currents of 0.87 and . The two curves are separated with an offset for clarity.
Normalized slow axis far-field profiles of a DFB laser at for different duty cycles of 10%–50% in step of 10%. The inset shows room temperature cw far-field profile for the same DFB at a injection currents of 1 and .
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