OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 24, Iss. 1 — Jan. 1, 1985
  • pp: 26–33

Novel unstable resonator configuration with a self-filtering aperture: experimental characterization of the Nd:YAG loaded cavity

P. G. Gobbi, S. Morosi, G. C. Reali, and Amin S. Zarkasi  »View Author Affiliations

Applied Optics, Vol. 24, Issue 1, pp. 26-33 (1985)

View Full Text Article

Enhanced HTML    Acrobat PDF (1147 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A novel cavity design based on a confocal negative branch unstable resonator configuration is presented. A proper choice for the size of the field limiting aperture, set at the common focal plane of the mirrors, results in removal of the hot spot inside the cavity and in the smoothing of the spatial profile of the oscillating mode. Application of this scheme to a pulsed Nd:YAG oscillator is thoroughly characterized in a variety of operational modes (fixed-Q, Q-switching, mode-locking). The main results are a high efficiency of energy extraction and excellent phase and amplitude profiles of the output beam, which shows real transform-limited performances.

© 1985 Optical Society of America

Original Manuscript: July 2, 1984
Published: January 1, 1985

P. G. Gobbi, S. Morosi, G. C. Reali, and Amin S. Zarkasi, "Novel unstable resonator configuration with a self-filtering aperture: experimental characterization of the Nd:YAG loaded cavity," Appl. Opt. 24, 26-33 (1985)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. We indicate here for simplicity only the more recent and comprehensive reviews on the subjects: for unstable resonators, W. H. Steier, in Laser Handbook, Vol. 3, M. L. Stitch, Ed. (North-Holland, Amsterdam, 1979), pp. 3–39;and for telescopic resonators, D. C. Hanna, C. G. Sawyers, M. A. Yuratich, “Large Volume TEM00 Mode Operation of Nd:YAG Lasers,” Opt. Quantum Electron. 13, 493 (1981). [CrossRef]
  2. P. G. Gobbi, G. C. Reali, “A Novel Unstable Resonator Configuration with a Self Filtering Aperture,” to be published in Opt. Commun.
  3. A. E. Siegman, “Unstable Optical Resonator for Laser Applications,” Proc.IEEE 53, 277 (1965). [CrossRef]
  4. T. F. Ewanizky, “A High Radiance Flashlamp Pumped Dye Laser,” Appl. Phys. Lett. 25, 295 (1974). [CrossRef]
  5. T. F. Ewanizky, J. M. Craig, “Negative-Branch Unstable Resonator Nd:YAG Laser,” Appl. Opt. 15, 1465 (1976). [CrossRef] [PubMed]
  6. A. D. E. Brown, “Unstable, Q-Switched, Ruby Resonator in the Negative Branch Confocal Configuration,” Opt. Commun. 27, 253 (1978). [CrossRef]
  7. W. F. Krupke, W. R. Sooy, “Properties of an Unstable Confocal Resonator CO2 Laser System,” IEEE J. Quantum Electron. QE-5, 575 (1969). [CrossRef]
  8. A. H. Paxton, T. C. Salvi, “Unstable Resonator with Self-imaging Aperture,” Opt. Commun. 26, 305 (1978). [CrossRef]
  9. A. E. Siegman, R. Arrathoon, “Modes in Unstable Optical Resonators and Lens Waveguides,” IEEE J. Quantum Electron. QE-3, 156 (1967). [CrossRef]
  10. P. G. Gobbi, G. C. Reali, in preparation.
  11. J. G. Skinner, J. E. Geusic, “Diffraction-Limited Ruby Oscillator,” J. Opt. Soc. Am. 52, A1319 (1962).
  12. K. I. Zemskov, A. A. Isaev, M. A. Kazaryan, G. G. Petrash, S. G. Rautian, “Use of Unstable Resonators in Achieving the Diffraction Divergence of the Radiation Emitted from the High-Gain Pulsed Gas Lasers,” Sov. J. Quantum Electron. 4, 474 (1974). [CrossRef]
  13. Y. K. Park, R. L. Byer, “Electronic Linewidth Narrowing Method for Single Axial Mode Operation of Q-Switched Nd:YAG Lasers,” Opt. Commun. 37, 411 (1981). [CrossRef]
  14. A. J. Berry, D. C. Hanna, C. G. Sawyers, “High Power Single Frequency Operation of a Q-Switched TEM00 Mode Nd:YAG Laser,” Opt. Commun. 40, 54 (1981). [CrossRef]
  15. W. D. Fountain, M. Bass, “Single-Axial-Mode Operation of a Polarization-Coupled Stable/Unstable-Resonator Nd:YAG Laser Oscillator,” IEEE J. Quantum Electron. QE-18, 432 (1982). [CrossRef]
  16. W. H. Glenn, “The Fluctuation Model of a Passively Mode-Locked Laser,” IEEE J. Quantum Electron. QE-11, 8 (1975). [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