| Title of Invention | AN OPTICAL FEEDBACK UNIT FOR ENHANCEMENT OF NONLINEAR FREQUENCY CONVERSION EFFICIENCY |
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| Abstract | An optical feedback unit for enhancement of nonlinear frequency conversion efficiency is disclosed. The unit is effective for all those interactions involving at least one secondary coherent source that is generated from a primary laser source through nonlinear frequency conversion and the feedback being realized only for that radiation. The unit consists of a set of four or three properly coated dichoric mirrors, which are positioned with appropriate separation to introduce a positive feedback of energy by making the phase-shift an integral multiple of 2R between the original and the feedback radiation. Using the new unit greatly enhanced frequency conversion has been demonstrated for second harmonic and sum-frequency generation process in a nonlinear crystal with Nd:YAG laser radiation. Possible applications of such a unit in some other important frequency conversion processes like difference frequency generation and optical parametric oscillation are detailed along with feasibility of incorporation of focusing effect. |
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00638-kol-2005-description complete.pdf
638-kol-2005-granted-abstract.pdf
638-kol-2005-granted-claims.pdf
638-kol-2005-granted-correspondence.pdf
638-kol-2005-granted-description (complete).pdf
638-kol-2005-granted-drawings.pdf
638-kol-2005-granted-examination report.pdf
638-kol-2005-granted-form 1.pdf
638-kol-2005-granted-form 18.pdf
638-kol-2005-granted-form 2.pdf
638-kol-2005-granted-form 3.pdf
638-kol-2005-granted-letter patent.pdf
638-kol-2005-granted-reply to examination report.pdf
638-kol-2005-granted-specification.pdf
| Patent Number | 221735 | ||||||||
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| Indian Patent Application Number | 00638/KOL/2005 | ||||||||
| PG Journal Number | 27/2008 | ||||||||
| Publication Date | 04-Jul-2008 | ||||||||
| Grant Date | 03-Jul-2008 | ||||||||
| Date of Filing | 21-Jul-2005 | ||||||||
| Name of Patentee | DR. UDIT CHATTERJEE | ||||||||
| Applicant Address | PHYSICS DEPERTMENT, THE UNIVERSITY OF BURDWAN, GOLAPBAG, BURDWAN-713104 | ||||||||
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| PCT International Classification Number | G 02 F 1/00 | ||||||||
| PCT International Application Number | N/A | ||||||||
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