Low-power (10.6-μm) laser-beam amplification by thermal-grating-mediated degenerate four-wave mixing in a nematic liquid-crystal film

I. C. Khoo; P. Y. Yan; G. M. Finn; T. H. Liu; R. R. Michael

doi:10.1364/JOSAB.5.000202

Low-power (10.6-μm) laser-beam amplification by thermal-grating-mediated degenerate four-wave mixing in a nematic liquid-crystal film

I. C. Khoo, P. Y. Yan, G. M. Finn, T. H. Liu, R. R. Michael

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

We present a detailed theoretical analysis of degenerate four-wave mixing by a laser-induced thermal grating in a nematic liquid-crystal film. In particular, we show that the coupling of the (strong) pump beam to the first-order diffracted beam can give rise to substantial amplification of a (weak) probe beam. Experimental verification of this effect with a CO2 laser beam is also made. A probe-beam gain of greater than 20 can easily be observed in a 120-μm film with a pump intensity of the order of a few watts per square centimeter.

Original language	English (US)
Pages (from-to)	202-206
Number of pages	5
Journal	Journal of the Optical Society of America B: Optical Physics
Volume	5
Issue number	2
DOIs	https://doi.org/10.1364/JOSAB.5.000202
State	Published - Feb 1988

All Science Journal Classification (ASJC) codes

Statistical and Nonlinear Physics
Atomic and Molecular Physics, and Optics

Access to Document

10.1364/JOSAB.5.000202

Cite this

@article{570a3f5083f649a9b3e45962203c6aa6,

title = "Low-power (10.6-μm) laser-beam amplification by thermal-grating-mediated degenerate four-wave mixing in a nematic liquid-crystal film",

abstract = "We present a detailed theoretical analysis of degenerate four-wave mixing by a laser-induced thermal grating in a nematic liquid-crystal film. In particular, we show that the coupling of the (strong) pump beam to the first-order diffracted beam can give rise to substantial amplification of a (weak) probe beam. Experimental verification of this effect with a CO2 laser beam is also made. A probe-beam gain of greater than 20 can easily be observed in a 120-μm film with a pump intensity of the order of a few watts per square centimeter.",

author = "Khoo, {I. C.} and Yan, {P. Y.} and Finn, {G. M.} and Liu, {T. H.} and Michael, {R. R.}",

year = "1988",

month = feb,

doi = "10.1364/JOSAB.5.000202",

language = "English (US)",

volume = "5",

pages = "202--206",

journal = "Journal of the Optical Society of America B: Optical Physics",

issn = "0740-3224",

publisher = "The Optical Society",

number = "2",

}

TY - JOUR

T1 - Low-power (10.6-μm) laser-beam amplification by thermal-grating-mediated degenerate four-wave mixing in a nematic liquid-crystal film

AU - Khoo, I. C.

AU - Yan, P. Y.

AU - Finn, G. M.

AU - Liu, T. H.

AU - Michael, R. R.

PY - 1988/2

Y1 - 1988/2

N2 - We present a detailed theoretical analysis of degenerate four-wave mixing by a laser-induced thermal grating in a nematic liquid-crystal film. In particular, we show that the coupling of the (strong) pump beam to the first-order diffracted beam can give rise to substantial amplification of a (weak) probe beam. Experimental verification of this effect with a CO2 laser beam is also made. A probe-beam gain of greater than 20 can easily be observed in a 120-μm film with a pump intensity of the order of a few watts per square centimeter.

AB - We present a detailed theoretical analysis of degenerate four-wave mixing by a laser-induced thermal grating in a nematic liquid-crystal film. In particular, we show that the coupling of the (strong) pump beam to the first-order diffracted beam can give rise to substantial amplification of a (weak) probe beam. Experimental verification of this effect with a CO2 laser beam is also made. A probe-beam gain of greater than 20 can easily be observed in a 120-μm film with a pump intensity of the order of a few watts per square centimeter.

UR - http://www.scopus.com/inward/record.url?scp=84975571210&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84975571210&partnerID=8YFLogxK

U2 - 10.1364/JOSAB.5.000202

DO - 10.1364/JOSAB.5.000202

M3 - Article

AN - SCOPUS:84975571210

SN - 0740-3224

VL - 5

SP - 202

EP - 206

JO - Journal of the Optical Society of America B: Optical Physics

JF - Journal of the Optical Society of America B: Optical Physics

IS - 2

ER -

Low-power (10.6-μm) laser-beam amplification by thermal-grating-mediated degenerate four-wave mixing in a nematic liquid-crystal film

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this