Abstract
High-power distributed feedback (DFB) laser diodes are well established for continuous-wave (CW) applications[1]. For high-power operation, self-heating of the active zone becomes important and has to be taken into account in the design of the laser. For example, the peak wavelength of the gain spectrum increases with temperature at a much larger rate than the Bragg wavelength of the grating. For maximum efficiency and side mode suppression, the gain peak and Bragg wavelengths should nearly coincide at operation temperature and output power. This means that by design, the gain peak wavelength should be shorter than the Bragg wavelength at room temperature and small power.
© 2009 IEEE
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