Stokes phase preservation during Raman amplification

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · J. Opt. Soc. Am. B: Opt. Phys.; (United States)

DOI:https://doi.org/10.1364/JOSAB.3.001448· OSTI ID:5185684

Fulghum, S F; Klimek, D; Flusberg, A; Trainor, D W; Duzy, C; Hyman, H; Daugherty, J D; Korff, D

Experiments have been performed to measure the degree to which the phase information on an input Stokes beam can be perserved in a hydrogen Raman amplifier in the presence of phase and intensity nonuniformities on the pump beam. The experiments were conducted at Fresnel numbers of about 40 and at amplified Stokes fluences of up to 3.4 J cm/sup -2/. Astigmatism and focus on the pump did not transfer to the Stokes, and astigmatism on the input Stokes was maintained during amplification. Strong, ordered intensity nonuniformities on the pump beam resulted in large wave-front errors on the amplified Stokes, possibly due to a self-focusing effect. A more uniform pump resulted in an amplified Stokes beam quality of 1.2 times the diffraction limit.

• Research Organization: Avco Research Laboratory, Inc., Everett, Massachusetts 01907
• OSTI ID: 5185684
• Journal Information: J. Opt. Soc. Am. B: Opt. Phys.; (United States), Journal Name: J. Opt. Soc. Am. B: Opt. Phys.; (United States) Vol. 3:10; ISSN JOBPD
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
AMPLIFIERS
BEAM OPTICS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
GASES
HYDROGEN
LASER RADIATION
NONLINEAR OPTICS
NONMETALS
OPTICAL PUMPING
OPTICS
PHASE SHIFT
PUMPING
RADIATIONS
RAMAN EFFECT
STOKES PARAMETERS
VISIBLE RADIATION