A Single Spectral Mode Wide Stripe Laser With Very Narrow Linewidth

We present results on a single spectral mode wide stripe semiconductor laser with an integrated surface etched distributed Bragg reflector operating at 975 nm with very narrow linewidth. Linewidths as low as 220 kHz have been obtained from a 40 mu m wide stripe laser. For 980 nm devices reporting a linewidth of sub-1 MHz, the power of 0.5W (linewidth of 350 kHz) is the highest obtained at this wavelength. (C) 2011 American Institute of Physics. [doi:10.1063/1.3656024]