Raman shifting in the absence of multiple Stokes orders with a Nd:YAG laser in hydrogen: evidence of coupling between the forward and backward Stokes processes

Author

Watson, Jason P. ; Miller, Harold C.

Author_Institution

Optical Sci. Center, Arizona Univ., Tucson, AZ, USA

Volume

33

Issue

8

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

1288

Lastpage

1293

Abstract

By Raman shifting the output of a 1.319-μm Nd:YAG laser in hydrogen, up to 24.5 mJ of Stokes light at 2.918 μm has been generated. Due to the low energy of the 2.918-μm Stokes photons, the first Stokes is the only Stokes line for this system. The effect of pressure on the conversion is notably simpler in this regime, but the gain saturates unusually slowly. An unexpected pump linewidth sensitivity in the forward Stokes conversion is observed. Coupling of the forward and backward Stokes processes is suggested as an explanation for these effects and is supported by a simple model

Keywords

Raman spectra; hydrogen; laser transitions; neodymium; optical couplers; optical pumping; optical saturation; photons; sensitivity; solid lasers; 1.319 mum; 2.918 mum; 24.5 mJ; Nd:YAG laser; Raman shifting; Stokes line; Stokes photons; YAG:Nd; YAl5O12:Nd; backward Stokes processes; forward Stokes conversion; forward Stokes processes; gain saturation; hydrogen; low energy; multiple Stokes orders; unexpected pump linewidth sensitivity; Gas lasers; Hydrogen; Laser excitation; Laser modes; Laser theory; Laser transitions; Lenses; Optical resonators; Pump lasers; Structural beams;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.605549

Filename

605549