Using an external cavity with holographic grating, we demonstrate the spectral narrowing of a high power broad-area-diode with a single emitter. The spectral bandwidth of less than 15 GHz is obtained with output power exceeding 10 W and external cavity efficiency exceeding 60%. Absorption of 98% of the laser radiation by a 25-mm rubidium vapor cell filled with 600-torr ethane at a temperature of 368 K is acquired, which demonstrates the availability of this pump source for efficient rubidium laser pumping.
© 2011 Chinese Optics Letters
Zining Yang, Yuandong Li, Hongyan Wang, Qisheng Lu, and Xiaojun Xu, "Frequency-narrowed external-cavity broad-area-diode for rubidium laser pumping," Chin. Opt. Lett. 9, 061401- (2011)