OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 37, Iss. 30 — Oct. 20, 1998
  • pp: 7044–7048

Dynamic correction of thermal focusing in Nd:YAG confocal unstable resonators by use of a variable radius mirror

Inon Moshe, Steven Jackel, and Raphael Lallouz  »View Author Affiliations

Applied Optics, Vol. 37, Issue 30, pp. 7044-7048 (1998)

View Full Text Article

Enhanced HTML    Acrobat PDF (169 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



Excellent beam quality and divergence stability over a wide pump power range was demonstrated in a Q-switched, Nd:YAG, positive branch confocal unstable resonator by using a one degree-of-freedom, adaptive optic. Unlike single-element flexible-membrane mirrors, the variable radius mirror (VRM) consisted of a lens and mirror, whose separation determined the VRM’s effective radius of curvature. This simple method enabled low cost and efficient thermal focusing compensation. The VRM was demonstrated by producing a 300-mJ Q-switch or 1-J free-running at a beam quality factor M2 that varied between 1.2 and 1.8 as the average output power varied between 0 and 33 W.

© 1998 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(350.6830) Other areas of optics : Thermal lensing

Original Manuscript: June 22, 1998
Revised Manuscript: July 13, 1998
Published: October 20, 1998

Inon Moshe, Steven Jackel, and Raphael Lallouz, "Dynamic correction of thermal focusing in Nd:YAG confocal unstable resonators by use of a variable radius mirror," Appl. Opt. 37, 7044-7048 (1998)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. A. Siegman, Lasers (University Science, Mill Valley, Calif., 1986), pp. 858–922.
  2. A. Siegman, “Modes in unstable optical resonators and lens waveguides,” IEEE J. Quantum Electron. QE-3, 156–163 (1967). [CrossRef]
  3. S. De Silvestri, V. Magni, O. Svelto, G. Valentini, “Lasers with super-Gaussian mirrors,” IEEE J. Quantum Electron. 26, 1500–1509 (1990). [CrossRef]
  4. S. De Silvestri, V. Magni, S. Taccheo, G. Valentini, “Q-Switched Nd:YAG laser with super-Gaussian resonators,” Opt. Lett. 16, 642–644 (1991). [CrossRef] [PubMed]
  5. P. A. Bélanger, C. Paré, “Unstable laser resonators with a specified output profile by using a graded-reflectivity mirror: geometrical optics limit,” Opt. Commun. 109, 507–517 (1994). [CrossRef]
  6. S. A. Chetkin, G. V. Vdovin, “Deformable mirror correction of a thermal lens induced in the active rod of a solid state laser,” Opt. Commun. 100, 159–165 (1993). [CrossRef]
  7. K. Du, P. Loosen, H. Kochmann, “Properties of a high-power CO2 laser with an adaptive mirror,” Opt. Commun. 106, 269–277 (1994). [CrossRef]
  8. N. Pavel, T. Dascalu, V. Lupei, “Variable reflectivity mirror unstable resonator with deformable mirror thermal compensation,” Opt. Commun. 123, 115–120 (1996). [CrossRef]
  9. S. Jackel, I. Moshe, “Method and apparatus for compensating thermal effects in laser resonators and multiple-pass amplifiers,” Israel Patent application121720 (1997).
  10. I. Moshe, S. Jackel, R. Lalluz, “Working beyond the static limits of laser stability by use of adaptive and polarization-conjugation optics,” Appl. Opt. 37, 6415–6420 (1998). [CrossRef]
  11. W. Koechner, Solid-State Laser Engineering, 4th ed. (Springer-Verlag, New York, 1996), pp. 204–205.
  12. A. Parent, M. Morin, P. Lavingne, “Propagation of Gaussian field distributions,” Opt. Quantum Electron. 24, S1071–S1079 (1992). [CrossRef]
  13. C. Swift, E. Bliss, D. Lenz, R. Miller, “Deformable mirror for zigzag solid-state lasers,” Opt. Eng. 29, 1199–1203 (1990). [CrossRef]
  14. A. V. Kuryashov, V. I. Shmalhausen, “Semipassive bimorph flexible mirrors for atmospheric adaptive optics applications,” Opt. Eng. 35, 3064–3073 (1996). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited