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Photorefractive processes at near infrared wavelengths

Photorefractive processes at near infrared wavelengths
Photorefractive processes at near infrared wavelengths
Phase conjugation using photorefractive crystals has found many application in areas such as optical processing and distortion correction. The simplest and most elegant configuration (self-pumped phase conjugation, SPFC) allows phase conjugation without the need for additional optics - a single laser beam incident upon a cut, polished crystal induces a refractive index grating which in turn diffracts light to generate the precise phase conjugate of the incident beam. Observation of the effect has been carried out mainly in the visible part of the spectrum where crystal response has tended to be most efficient.
However, with the availability of diode lasers operating at near infrared wavelengths, recent attention has been drawn to the possibility of extending the crystal response to allow observation of SPFC and other photorefractive processes at diode compatible wavelengths. Efficient SPPC has already been observed with reflectivities as high as 72% at 800nm, using a nominally undoped crystal of photorefractive BaTiO3, and there has been a concerted effort to extend and enhance the response in the near infrared region via the addition of different dopants.
University of Southampton
Ross, G.W.
e881119e-2126-442e-a24d-506dac48a4a4
Hribek, P.
1bc0cd09-b540-482a-9f04-a603e7304e27
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Laser Facility Committee
Ross, G.W.
e881119e-2126-442e-a24d-506dac48a4a4
Hribek, P.
1bc0cd09-b540-482a-9f04-a603e7304e27
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020

Ross, G.W., Hribek, P. and Eason, R.W. , Laser Facility Committee (1993) Photorefractive processes at near infrared wavelengths Southampton. University of Southampton

Record type: Monograph (Project Report)

Abstract

Phase conjugation using photorefractive crystals has found many application in areas such as optical processing and distortion correction. The simplest and most elegant configuration (self-pumped phase conjugation, SPFC) allows phase conjugation without the need for additional optics - a single laser beam incident upon a cut, polished crystal induces a refractive index grating which in turn diffracts light to generate the precise phase conjugate of the incident beam. Observation of the effect has been carried out mainly in the visible part of the spectrum where crystal response has tended to be most efficient.
However, with the availability of diode lasers operating at near infrared wavelengths, recent attention has been drawn to the possibility of extending the crystal response to allow observation of SPFC and other photorefractive processes at diode compatible wavelengths. Efficient SPPC has already been observed with reflectivities as high as 72% at 800nm, using a nominally undoped crystal of photorefractive BaTiO3, and there has been a concerted effort to extend and enhance the response in the near infrared region via the addition of different dopants.

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Published date: 1993
Additional Information: Annual report to the Laser Facility Committee

Identifiers

Local EPrints ID: 77303
URI: http://eprints.soton.ac.uk/id/eprint/77303
PURE UUID: dc4b23b3-b22d-4cd5-aa05-590d735efe09
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

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Date deposited: 11 Mar 2010
Last modified: 07 Oct 2020 03:08

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Contributors

Author: G.W. Ross
Author: P. Hribek
Author: R.W. Eason ORCID iD
Corporate Author: Laser Facility Committee

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