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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 4, Iss. 8 — Aug. 1, 1987
  • pp: 1276–1280

Competition effects in the polarization of light in a quasi-isotropic laser

G. Stephan, A. D. May, R. E. Mueller, and B. Aissaoui  »View Author Affiliations

JOSA B, Vol. 4, Issue 8, pp. 1276-1280 (1987)

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We report on two experiments involving polarization competition in a quasi-isotropic 3.39-μm He–Ne laser. In one, competition between externally determined polarization modes yields a crenellated line shape, except for small frequency ranges where residual anisotropies become important. In the second experiment, the internal anisotropies are determined and controlled by a tilted internal talon. Here, dips and peaks are observed in the intensity output of the laser.

© 1987 Optical Society of America

Original Manuscript: January 28, 1987
Manuscript Accepted: April 22, 1987
Published: August 1, 1987

G. Stephan, A. D. May, B. Aissaoui, and R. E. Mueller, "Competition effects in the polarization of light in a quasi-isotropic laser," J. Opt. Soc. Am. B 4, 1276-1280 (1987)

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  1. The polarization flip between two modes was first observed on the 1.15-μ m line of Ne by W. Culshaw, J. Kannelaud, “Coherence effects in gaseous lasers with axial magnetic field. II. Experiments,” Phys. Rev. 141, 237 (1966); it was also observed on the 632.8-nm line of Ne by E. Yu. Andreyeva, K. D. Teryokhin, S. A. Fridrikhov, “Polarization of radiation from a single frequency He–Ne laser,” Opt. Spektrosk. 27, 809 (1969) [Opt. Spectrosc. (USSR) 27, 441 (1969)]. These two lines are naturally linearly polarized. The flip between two circular modes has also been observed on the 1.52-μ m line of Ne in a magnetic field by R. L. Fork, W. J. Tomlinson, L. J. Heilos, “Hysteresis in an He–Ne laser,” Appl. Phys. Lett. 8, 162 (1966). Polarization flips have also been observed in diode lasers by Y. C. Chen, J. M. Liu, “Polarization bistability in semiconductor lasers,” Appl. Phys. Lett. 46, 16 (1985); N. K. Dutta, D. C. Craft, “Effect of stress on the polarization of stimulated emission from injection lasers,” J. Appl. Phys. 56, 65 (1984). [CrossRef]
  2. G. Stephan, D. Hugon, “Light polarization of a quasi-isotropic laser with optical feedback,” Phys. Rev. Lett. 55, 703 (1985). [CrossRef] [PubMed]
  3. We use reflectance amplitude rather than reflectivity and ignore any unimportant phase factors.
  4. We have computed the effect of the feedback on the round-trip phase change and verified that it has a negligible effect on the net gain of the laser in our experiment. The feedback is thus equivalent to a change in the reflectance of the laser mirror. This is true only for weak feedback.
  5. The first curve recorded in the sequence described here was the crenellated line shape of Fig. 2(b), obtained with a pressure of 0.8 Torr in order to display the Lamb dip. The pressure was then set at 1.25 Torr for the other curves.
  6. We now use d as a subscript to identify the single external cavity formed by the detector.
  7. G. Stephan, B. Aissoui, A. Kellou, “A flip flop interferometer,” IEEE J. Quantum Electron. QE-23, 458 (1987). [CrossRef]
  8. J. M. Liu, “Digital optical processing with polarization bistable semiconductor lasers,” IEEE J. Quantum Electron. QE-21, 298 (1985).
  9. P. Esherick, A. Owyoung, “Polarization feedback stabilization of an injection seeded Nd:YAG laser for spectroscopic application,” J. Opt. Soc. Am. B 4, 41 (1987). [CrossRef]

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Fig. 1 Fig. 2 Fig. 3
Fig. 4 Fig. 5

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