Abstract

Two counteracting frequency shifters and a Fabry–Perot filter represent a nonreciprocity of the phase or amplitude type. In a fiber ring laser they permit narrow-band unidirectional operation with continuous tunability and switchable sense of rotation. Electronic stabilization at the switch-over point yields simultaneous operation at two frequencies.

© 1993 Optical Society of America

Tunable fiber frequency shifter that uses an all-fiber ring resonator

K. Kalli and D. A. Jackson
Opt. Lett. 17(17) 1243-1245 (1992)

Continuously tunable single-frequency erbium ring fiber laser

A. Gloag, N. Langford, K. McCallion, and W. Johnstone
J. Opt. Soc. Am. B 13(5) 921-925 (1996)

Frequency locking of an erbium-doped fiber ring laser to an external fiber Fabry–Perot resonator

Namkyoo Park, Jay W. Dawson, and Kerry J. Vahala
Opt. Lett. 18(11) 879-881 (1993)

Single-frequency cw and Q -switched operation of a diode-pumped Nd:YAG 1.3-μm ring laser

A. B. Neilson, W. A. Clarkson, and D. C. Hanna
Opt. Lett. 18(17) 1426-1428 (1993)

Single-frequency diode-pumped Nd:YAG ring laser with no intracavity elements

G. T. Maker, G. P. A. Malcolm, and A. I. Ferguson
Opt. Lett. 18(21) 1813-1815 (1993)