406 / 2019-02-14 09:36:51

High power 880nm laser chip with a predicted MTTF of 200,000 hours

880nm,high power,laser chip,MTTF

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Large optical cavity and low internal losses less than 0.62cm-1 were both used in the 880nm laser structure design, and the epitaxy of this structure was implemented by MOCVD. Laser chip with 200μm emitter width and 4mm cavity length was achieved by a series of standard and special manufacturing processes. After mounted on AlN sub-mounts p-side down, the threshold current of the 880nm laser was tested to be 1.1A, the slope efficiency was 1.11W/A, the center operation wavelength was 880.8nm at 11A with the full width at half maximum (FWHM) of 2.2nm. The accelerated aging tests were carried out with the continuous current stress of 16A and the cooled water temperature of 20℃, and there was no failure when the aging time reached 2000h. The MTTF was calculated to be 200,000 hours base on Arrhenius model under the ISO/FDIS 17526.