University College London, Selviah, D.R., Chang, C.C.
(1996)
Phase conjugation apparatus and method of phase conjugating light.
WO 96/30802.
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Abstract
3 novel Self pumped configurations and 3 novel mutually pumped configurations for phase conjugation in photorefractive crystals A phase-conjugation apparatus comprises a photo-refractive crystal and means for directing one beam Iin of light in a self-pumped configuration (or a plurality of beams of light in a mutually-pumped configuration) into the crystal so that a phase-conjugation process takes place and a phase-conjugated beam Ipc is returned along the same path as the input beam. In order to enable improvements to be made in the range of input beam positions and/or beam orientations, and/or being the time to reach stability, and/or overall stability, and/or the phase-conjugation efficiency, the input beam is incident on the crystal at an obtuse angle to the direction in which a beam of any orientation would ultimately tend to bend in the crystal, which in the case of a barium titanate crystal equates to the so-called +C direction.
| Type: | Patent |
|---|---|
| Title: | Phase conjugation apparatus and method of phase conjugating light |
| Identifier: | WO 96/30802 |
| Open access status: | An open access version is available from UCL Discovery |
| Additional information: | Imported via OAI, 7:29:01 5th Apr 2007; Imported via OAI, 7:29:00 24th Aug 2007 |
| Keywords: | phase conjugation, mutually pumped, self pumped, robust, angular misalignment tolerance, lateral misalignment tolerance, fish head |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/2885 |
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