A 760-nm light source of >10 mW is obtained from a frequency-doubled external-cavity diode laser by use of using an erbium-doped fiber amplifier and a periodically poled lithium niobate waveguide. The 5S1/2 → 7S1/2 two-photon transitions of rubidium are observed with such a light source. This laser frequency is locked to the Rb two-photon transitions with an instability of 10 kHz (1 s). Our experimental scheme provides a compact, high-performance frequency, standard in the S band (1480–1530 nm) for fiber-optic communication and sensing applications.
© 2004 Optical Society of America
Hsiang-Chen Chui, Yi-Wei Liu, Jow-Tsong Shy, Sen-Yen Shaw, Rostislav V. Roussev, and Martin M. Fejer, "Frequency-Stabilized 1520-nm Diode Laser with Rubidium 5S1/2 → 7S1/2 Two-Photon Absorption," Appl. Opt. 43, 6348-6351 (2004)