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Applied Optics

Applied Optics


  • Vol. 38, Iss. 33 — Nov. 20, 1999
  • pp: 6874–6878

Excess-noise dependence on intracavity aperture shape

G. P. Karman, G. S. McDonald, J. P. Woerdman, and G. H. C. New  »View Author Affiliations

Applied Optics, Vol. 38, Issue 33, pp. 6874-6878 (1999)

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In lasers with nonorthogonal eigenmodes the excess-noise factor K can be large, especially in unstable-cavity lasers with hard-edged intracavity apertures. To the best of our knowledge, we report the first detailed study of the dependence of K on aperture shape. Calculations and measurements of K for unstable-cavity lasers with variable-size apertures of triangular, square, pentagonal, hexagonal, octagonal, and rhomboid symmetries are summarized. It is shown that both the magnitude of K and its resonant behavior strongly depend on aperture shape and that many aspects of this dependence can be explained in terms of one-dimensional resonance lengths.

© 1999 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1940) Diffraction and gratings : Diffraction
(140.3460) Lasers and laser optics : Lasers
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(270.3430) Quantum optics : Laser theory

Original Manuscript: July 1, 1999
Revised Manuscript: July 1, 1999
Published: November 20, 1999

G. P. Karman, G. S. McDonald, J. P. Woerdman, and G. H. C. New, "Excess-noise dependence on intracavity aperture shape," Appl. Opt. 38, 6874-6878 (1999)

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  1. K. Petermann, “Calculated spontaneous emission factor for double-heterostructure injection lasers with gain-induced waveguiding,” IEEE J. Quantum Electron. QE-15, 566–570 (1979). [CrossRef]
  2. A. E. Siegman, “Excess spontaneous emission in non-Hermitian optical systems. I. Laser amplifiers,” Phys. Rev. A 39, 1253–1263 (1989); “Excess spontaneous emission in non-Hermitian optical systems. II. Laser oscillators,” Phys. Rev. A 39, 1264–1268 (1989). [CrossRef] [PubMed]
  3. G. P. Karman, J. P. Woerdman, “Fractal structure of eigenmodes of unstable-cavity lasers,” Opt. Lett. 23, 1909–1911 (1998). [CrossRef]
  4. A. L. Schawlow, C. H. Townes, “Infrared and optical masers,” Phys. Rev. 112, 1940–1949 (1958). [CrossRef]
  5. G. H. C. New, “The origin of excess noise,” J. Mod. Opt. 42, 799–810 (1995). [CrossRef]
  6. A. E. Siegman, “Lasers without photons—or should it be lasers with too many photons?,” Appl. Phys. B 60, 247–257 (1995). [CrossRef]
  7. M. A. Rippin, G. H. C. New, “Excess-noise factors in circular unstable resonators,” J. Mod. Opt. 43, 993–1008 (1996). [CrossRef]
  8. Y. J. Cheng, C. G. Fanning, A. E. Siegman, “Experimental observation of a large excess quantum noise factor in the linewidth of a laser oscillator having nonorthogonal modes,” Phys. Rev. Lett. 77, 627–630 (1996). [CrossRef] [PubMed]
  9. M. A. van Eijkelenborg, Å. M. Lindberg, M. S. Thijssen, J. P. Woerdman, “Resonance of quantum noise in an unstable-cavity laser,” Phys. Rev. Lett. 77, 4314–4317 (1996). [CrossRef] [PubMed]
  10. M. A. van Eijkelenborg, Å. M. Lindberg, M. S. Thijssen, J. P. Woerdman, “Influence of transverse resonator geometry on excess noise,” Opt. Commun. 137, 303–307 (1997). [CrossRef]
  11. W. H. Southwell, “Unstable-resonator-mode derivation using virtual-source theory,” J. Opt. Soc. Am. A 3(11) , 1885–1891 (1986). [CrossRef]
  12. A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).
  13. Å. M. Lindberg, M. A. van Eijkelenborg, J. P. Woerdman, “Measuring the quantum-limited linewidth of a laser using the Zeeman effect,” IEEE J. Quantum Electron. 33, 1767–1773 (1997). [CrossRef]
  14. G. P. Karman, Å. M. Lindberg, J. P. Woerdman, “Observed factorization of excess quantum noise that is due to both polarization and spatial mode nonorthogonality,” Opt. Lett. 23, 1698–1700 (1998). [CrossRef]
  15. G. S. McDonald, W. J. Firth, “Spatial grid symmetries and reduced models in the simulation of beam counterpropagation in a nonlinear medium,” J. Mod. Opt. 40, 23–32 (1993). [CrossRef]
  16. G. S. McDonald, G. H. C. New, J. P. Woerdman, “Excess noise in low Fresnel number unstable resonators,” Opt. Commun. 164, 285–295 (1998). [CrossRef]

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