Simultaneous asynchronous mode locking of two wavelengths in a Nd3+-doped fiber laser is reported. The laser operates simultaneously at wavelengths of 1.060 and 1.100 μm, where carrier-type passive mode locking is employed for the shorter wavelength and Kerr-type passive mode locking is used for the longer wavelength. The difference between the two repetition rates may be varied over a range from several megahertz to 500 Hz, limited by the onset of pulse interactions at small difference frequencies.
© 1995 Optical Society of America
Original Manuscript: September 2, 1994
Published: January 15, 1995
M. H. Ober, G. Sucha, and M. E. Fermann, "Controllable dual-wavelength operation of a femtosecond neodymium fiber laser," Opt. Lett. 20, 195-197 (1995)