LASERS

Award Information
Agency: Department of Energy
Branch: N/A
Contract: N/A
Agency Tracking Number: 1233
Amount: $49,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1984
Solitcitation Year: N/A
Solitcitation Topic Code: N/A
Solitcitation Number: N/A
Small Business Information
Optra, Inc.
1727 Revere Beach Pkwy., Everett, MA, 02149
Duns: N/A
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 MICHAEL HERCHER
 STAFF ENGINEER
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract
A PROGRAM TO DEVELOP STABILIZED FABRY-PEROT ETALONS (CONFOCAL AND PLANE-MIRROR), BASED ON THE APPLICATION OF STABILIZED 2-FREQUENCY LASERS, IS PROPOSED. THE 2-FREQUENCY LASER HAS BE DEMONSTRATED TO HAVE EXCELLENT FREQUENCY STABILITY. ITS OUTPUT CONSISTS OF ORTHOGONALLY POLARIZED COL-LINEAR BEAMS WHICH DIFFER IN FREQUENCY BY A TYPICAL VALUE OF 250 KHZ. THIS PERMITS THE RAPID COMPARISON OF DIFFERENTIAL OPTICAL PATH DIFFERENCES, WHICH IN TURN MAKES POSSIBLE A SERVO SYSTEM WITH A BANDWIDTH (OR STIFFNESS) LIMITED ONLY BY THE MECHANICAL PROPERTIES OF THE CONTROL ELEMENTS. THE HIGH OPERATING FREQUENCY AND RADIANCE OF THE LASER BEAM COMBINE TO ALLOW CONTROL RESOLUTIONS AT THE FUNDAMENTAL SHOT-NOISE LIMIT, WITH A VIRTUALLY UNLIMITED CONTROL RANGE. THE PROPOSED TECHNIQUE IS APPLICABLE TO THE FREQUENCY STABILIZATION OF BOTH CONFOCAL AND PLANE-MIRROR FABRY-PEROT ETALONS, AND CAN ALSO BE USED TO VERY PRECISELY CONTROL THE PARALLELISM OF THE FLAT FABRY-PEROT MIRRORS. IN ORDER TO ACHIEVE HIGH EFFICIENCY IN A PLANE-MIRROR FABRY-PEROT ETALON, IT IS SHOWN THAT DISSIPATIVE LOSSES MUST BE MINIMIZED, AND THAT THE MIRROR REFLECTANCE MUST BE VERY PRECISELY CONTROLLED. THE DESIGN AND FABRICATION OF A PLANE-MIRROR FABRY-PEROT ETALON WITH A FINESSE OF 20 AND A PEAK TRANSMISSION OF 95% IS PROPOSED.

* information listed above is at the time of submission.

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