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Wavelength stabilization against temperature variation of high-power broad area 1.5-&#x03BC;m InGaAsP/InP laser diodes is demonstrated by employing surface gratings. The development targets application in eye-safe automotive LIDAR systems, which would benefit from deploying narrowband receiver filters to block ambient solar radiation for improved signal-to-noise ratio. The surface grating is monolithically integrated on the laser chip using nanoimprint lithography. The peak power of the lasers exceeded 6 W in pulsed mode, for an FWHM spectral width of 0.3 nm and a peak wavelength drift of only 0.1 nm/&#x00B0;C. The wavelength shift with temperature is reduced by five times compared to broad area high-power Fabry-Perot laser diodes typically employed in LIDAR systems.

ieee photonics technology letters

High-Power 1.5-<inline-formula> <tex-math notation="LaTeX">$\mu$ </tex-math></inline-formula>m Broad Area Laser Diodes Wavelength Stabilized by Surface Gratings

High-Power 1.5- $\mu$ m Broad Area Laser Diodes Wavelength Stabilized by Surface Gratings