PRODUCTION OF HIGH-POWER CW UV BY RESONANT FREQUENCY QUADRUPLING OF A ND:YLF LASER.

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We have constructed a single ring to resonantly double an 18 watt Nd:YLF mode-locked laser and re-double the stored green to produce over 4 watts of power in the ultra-violet (UV). This laser is used to produce a beam of 470 MeV gamma-rays by Compton backscattering the laser beam from 2.8 GeV electrons stored in a synchrotron. Achieving high luminosity of the colliding beams requires very good mode quality and beam stability at the intersection point 22 meters from the laser. The ring consists of six mirrors, with two 25 cm radius of curvature mirrors enclosing each nonlinear crystal. The ... continued below

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12 pages

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KUCZEWSKI,A.J. January 28, 1999.

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Description

We have constructed a single ring to resonantly double an 18 watt Nd:YLF mode-locked laser and re-double the stored green to produce over 4 watts of power in the ultra-violet (UV). This laser is used to produce a beam of 470 MeV gamma-rays by Compton backscattering the laser beam from 2.8 GeV electrons stored in a synchrotron. Achieving high luminosity of the colliding beams requires very good mode quality and beam stability at the intersection point 22 meters from the laser. The ring consists of six mirrors, with two 25 cm radius of curvature mirrors enclosing each nonlinear crystal. The drive laser is a lamp pumped Nd:YLF with a 50 ps bunch length at 76 MHz. A pointing stabilizer servo has been constructed as part of the infrared (IR) mode matching telescope. The IR to green conversion is accomplished in a 15 mm long non-critically phased matched LB0 crystal located at a 40 micron waist, with an IR conversion efficiency of 70%. A stable, nearly diffraction limited W beam of up to 4.2 watts is generated in a BBO crystal in the green storage ring. The output power is relatively independent of the efficiency of the LB0 and BBO crystals. This fact makes it possible to reduce the amount of non-TEM{sub 00} modes created by walk-off of the UV by using relatively thin BBO crystals. At present, however, the lower bound on the BBO thickness is limited by the loss of conversion efficiency at high power.

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12 pages

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INIS; Refer requests to OSTI; OSTI as DE00011441

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  • PHOTONICS WEST, SAN JOSE, CA (US), 01/23/1999--01/29/1999

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  • Report No.: BNL--66320
  • Report No.: KB0101
  • Grant Number: AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 11441
  • Archival Resource Key: ark:/67531/metadc623583

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 28, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Nov. 9, 2015, 10:13 p.m.

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KUCZEWSKI,A.J. PRODUCTION OF HIGH-POWER CW UV BY RESONANT FREQUENCY QUADRUPLING OF A ND:YLF LASER., article, January 28, 1999; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc623583/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.