Abstract

Germanium-doped silica fibers were prepared for frequency doubling of 1.06-μm wavelength radiation under the simultaneous presence of the first, second, and fourth harmonics of the laser light. It was found that the preparation rate for frequency doubling was dramatically increased by the presence of the fourth harmonic. The experiments also showed that a metastable excited state plays a significant role in the process.

© 1991 Optical Society of America

Photoinduced second-harmonic generation in rare-earth-doped aluminosilicate optical fibers

D. M. Krol and J. R. Simpson
Opt. Lett. 16(21) 1650-1652 (1991)

Preparation of optical fibers for effective second-harmonic generation by the poling technique

P. Chmela
Opt. Lett. 16(7) 443-445 (1991)

Two-color interferometry using a detuned frequency-doubling crystal

Karl Koch and Gerald T. Moore
Opt. Lett. 16(18) 1436-1438 (1991)

Seeded second-harmonic generation in optical fibers: the effect of phase fluctuations

D. M. Krol, M. M. Broer, K. T. Nelson, R. H. Stolen, H. W. K. Tom, and W. Pleibel
Opt. Lett. 16(4) 211-213 (1991)

Experimental studies on efficient frequency doubling in glass optical fibers

Ulf Österberg and Walter Margulis
Opt. Lett. 12(1) 57-59 (1987)