Quality of the Stokes beam in stimulated Raman scattering

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/3.309885· OSTI ID:6982412

Heuvel, J.C. van den; Putten, F J.M. van; Lerou, R J.L. ^[1]

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1. TNO Physics and Electronics Lab., The Hague (Netherlands)

Stokes beam quality as obtained by stimulated Raman scattering is investigated numerically using various pump-beam profiles. It is found that the quality of the Stokes beam, expressed by M[sup 2], is often roughly the same as the pump beam. For pump beams with Gaussian-Hermite modes, TEM[sub 00] and TEM[sub 01], the Stokes beam has the same phase relation and M[sup 2] as the pump beam. However, the TEM[sub 11] pump beam, which has an M[sup 2] of 3.0, gives a Stokes beam with a higher M[sup 2], namely 3.7, and a distorted phase relation. For a Gaussian-Schell model beam, the M[sup 2] of the Stokes beam is equal to that of the pump if the Stokes has the same wavelength as the pump. If the ratio of the Stokes and the pump wavelength increases, then the M[sup 2] of the Stokes beam decreases. Experimental verification was obtained using a pump beam with an M[sup 2] of 8.7 and a wavelength of 1.06 [mu]m. The generated Stokes beam at 1.54 [mu]m had an M[sup 2] of 5.8, which agrees well with the numerical M[sup 2] of 6.1.

• OSTI ID: 6982412
• Journal Information: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States) Vol. 30:9; ISSN 0018-9197; ISSN IEJQA7
• Country of Publication: United States
• Language: English

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426002* -- Engineering-- Lasers & Masers-- (1990-)
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