OSA's Digital Library

Optics Letters

Optics Letters


  • Vol. 19, Iss. 15 — Aug. 1, 1994
  • pp: 1140–1142

In situ small-signal gain of solid-state lasers determined from relaxation oscillation frequency measurements

K. J. Weingarten, B. Braun, and U. Keller  »View Author Affiliations

Optics Letters, Vol. 19, Issue 15, pp. 1140-1142 (1994)

View Full Text Article

Enhanced HTML    Acrobat PDF (408 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We present a simple, in situ technique to calculate the small-signal gain of typical solid-state continuous-wave lasers, such as Nd:YAG and Nd:YLF lasers, by measuring the frequency of the relaxation oscillation noise peak. The laser’s small-signal gain can be directly calculated from the frequency of the relaxation oscillation with knowledge of the upper-state lifetime, the cavity round-trip time, and total losses, which are typically well-known values. When the laser is pumped many times above threshold the losses do not need to be known accurately. This technique is compared with the traditional method of changing output couplers to establish its accuracy.

© 1994 Optical Society of America

Original Manuscript: March 14, 1994
Published: August 1, 1994

K. J. Weingarten, B. Braun, and U. Keller, "In situ small-signal gain of solid-state lasers determined from relaxation oscillation frequency measurements," Opt. Lett. 19, 1140-1142 (1994)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. U. Keller, T. H. Chiu, J. F. Ferguson, Opt. Lett. 18, 217 (1993). [CrossRef] [PubMed]
  2. D. Findlay, R. A. Clay, Phys. Lett. 20, 277 (1966). [CrossRef]
  3. P. F. Moulton, J. Opt. Soc. Am. B 3, 125 (1986). [CrossRef]
  4. T. J. Kane, R. L. Byer, Opt. Lett. 10, 65 (1985). [CrossRef] [PubMed]
  5. A. Yariv, Optical Electronics (Holt, Rinehart & Winston, New York, 1976), Chap. 6, pp. 147–153.
  6. A. E. Siegman, Lasers (University Science Books, Mill Valley, Calif.1986), Chap. 25, pp. 962–964; Chap. 11, pp. 428–429.
  7. H. Shen, T. Lian, R. Zheng, Y. Zhou, G. Yu, C. Huang, H. Liao, Z. Zheng, IEEE J. Quantum Electron. 25, 144 (1989). [CrossRef]
  8. K. Kubodera, K. Otsuka, S. Miyazawa, Appl. Opt. 18, 884 (1979). [CrossRef] [PubMed]
  9. K. Otsuka, K. Kubodera, IEEE J. Quantum Electron. QE-16, 419 (1980). [CrossRef]
  10. A. L. Harmer, A. Linz, D. R. Gabbe, J. Phys. Chem. Solids 30, 1483 (1969). [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.


Fig. 1 Fig. 2 Fig. 3
Fig. 4

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited