We manufactured and investigated distributed Bragg reflector ridge-waveguide diode lasers having sixth-order surface gratings and an emission wavelength around 974 nm. The single-mode output power of the lasers with a total length of 4 mm exceeded 1 W. A very small spectral linewidth of 1.4 MHz (3 dB) consisting of a Lorentzian part of 146 kHz and a Gaussian part of 1308 MHz was measured using a self-delayed heterodyne measurement technique.
© 2010 Optical Society of America
Lasers and Laser Optics
Original Manuscript: September 23, 2009
Revised Manuscript: November 30, 2009
Manuscript Accepted: December 17, 2009
Published: January 29, 2010
K. Paschke, S. Spießberger, C. Kaspari, D. Feise, C. Fiebig, G. Blume, H. Wenzel, A. Wicht, and G. Erbert, "High-power distributed Bragg reflector ridge-waveguide diode laser with very small spectral linewidth," Opt. Lett. 35, 402-404 (2010)