A broadband Nd3+-doped fiber laser has been operated in an external cavity by pumping with an Ar+-ion laser. The emission spectrum of the fiber laser shows high sensitivity to intracavity absorption. The equivalent absorber path length is 15 km; with a loss-reduced setup that includes pumping by a diode laser this path length is 150 km. The spectrum of atmospheric absorption in the range from 1.065 to 1.145 μm has been recorded by stepwise tuning of the 0.3-nm-wide laser emission band by an intracavity prism.
© 1993 Optical Society of America
Original Manuscript: June 8, 1993
Published: November 15, 1993
R. Böhm, A. Stephani, V. M. Baev, and P. E. Toschek, "Intracavity absorption spectroscopy with a Nd3+-doped fiber laser," Opt. Lett. 18, 1955-1957 (1993)