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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 11 — Jun. 3, 2013
  • pp: 13118–13124

ASE and parasitic lasing in thin disk laser with anti-ASE cap

Hiroaki Furuse, Haik Chosrowjan, Junji Kawanaka, Noriaki Miyanaga, Masayuki Fujita, and Yasukazu Izawa  »View Author Affiliations

Optics Express, Vol. 21, Issue 11, pp. 13118-13124 (2013)

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The amplified spontaneous emission (ASE) and parasitic lasing (PL) effects in thin disk laser with an anti-ASE cap have been investigated in detail by measuring both time-resolved radiated intensity at longer axis of elliptical pump profile (dominant ASE direction) and small signal gain (SSG) in laser amplifier. A cryogenically-cooled total-reflection active-mirror laser consisting of 9.8 at.% doped, 0.6-mm thick Yb:YAG and un-doped YAG trapezoidal ceramics cap was used as a sample. The phased transitions from spontaneous emission (SE) to ASE and from ASE to PL have been unambiguously observed. For several pump beam diameters, the ASE gain parameter g0lASE at ASE threshold was about 3, and the SSG coefficient was down to about 65% until PL started. To the best of our knowledge, this is the first quantitative characterization of the ASE/PL effects in the thin disk laser with an anti-ASE cap.

© 2013 OSA

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 25, 2013
Revised Manuscript: May 15, 2013
Manuscript Accepted: May 16, 2013
Published: May 21, 2013

Hiroaki Furuse, Haik Chosrowjan, Junji Kawanaka, Noriaki Miyanaga, Masayuki Fujita, and Yasukazu Izawa, "ASE and parasitic lasing in thin disk laser with anti-ASE cap," Opt. Express 21, 13118-13124 (2013)

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