Coherent light generators – Particular beam control device – Q-switch
Patent
1991-11-06
1993-08-17
Davie, James W.
Coherent light generators
Particular beam control device
Q-switch
359326, 372 18, 372 21, 372 99, H01S 3098, H01S 310
Patent
active
052375773
ABSTRACT:
Saturation intensity and loss of a saturable absorber are substantially independently regulated by positioning the saturable absorber element within a Fabry-Perot etalon defined by first and second reflective elements so that the saturable absorber element responds to light at optical wavelengths in the anti-resonant portion of the Fabry-Perot spectral response, that is, between optical wavelengths corresponding to resonance peaks. The resulting combination of elements is called a Fabry-Perot saturable absorber. Thickness of the saturable absorber element substantially sets the loss of the Fabry-Perot saturable absorber while changes in the reflectivity of the first reflective element onto which the light is incident substantially determines the saturation intensity (degree of nonlinearity) and assists in compensating loss of the saturable absorber element. In one exemplary embodiment, a high reflectivity first reflective element is positioned on the end of the saturable absorber element facing the incident optical radiation while a high reflectivity second reflective element is positioned on the opposite end of the saturable absorber. Dielectric material layers form the first reflective element whereas semiconductor layers form the second reflective element. A plurality of quantum well and barrier layers are employed to form the saturable absorber element.
REFERENCES:
patent: 4597638 (1986-07-01), Chemla et al.
patent: 4720309 (1988-01-01), Deveaud et al.
patent: 4860296 (1989-08-01), Chemla et al.
patent: 4930131 (1990-05-01), Sizer, II
patent: 5007059 (1991-04-01), Keller et al.
S. S. Charschan, Lasers in Industry, Van Nostrand Reinhold Co., Chap. I--"Laser Fundamentals," pp. 21-28.
P. Das, Lasers and Optical Engineering, Springer-Verlag, Chap. III "Q-Switching and Mode Locking," pp. 240-253.
S. L. Chin, Fundamentals of laser optoelectronics, World Scientific, Series in Optics & Photonics--vol. I, pp. 232-234.
H. A. Macleod, Thin-film optical filters, 2nd Ed. 1986, Adam Hilger Ltd., Appendix--Characteristics of thin-film materials, pp. 509-511.
Harder et al., Appl. Phys. Lett., vol. 42, No. 9, May 1, 1983, "Passive mode locking of buried heterostructure . . . ," pp. 772-774.
Tsang et al., Appl. Phys. Lett., vol. 43, No. 4, Aug. 15, 1983, "Mode-locked semiconductor lasers with gateable . . . ," pp. 339-341.
U. Keller et al., Optics Letters, vol. 15, No. 23, Dec. 1, 1990, "Coupled-cavity resonant passive mode-locked . . . ," pp. 1377-1379.
Lee et al., Appl. Phys. Lett., vol. 58, No. 14, Apr. 8, 1991, "Active-passive mode-locked Nd: YAG laser . . . ," pp. 1464-1466.
U. Keller et al., Optics Letters, vol. 16, No. 16, Mar. 15, 1991, "Coupled-cavity resonant passive mode-locked Nd:yttrium . . . ," pp. 390-392.
Haas et al., J. Opt. Soc. Am. B., vol. 8, No. 6, Jun. 1991, "Theory of coupled-cavity mode locking with . . . ," pp. 1252-1258.
Keller Ursula
Miller David A. B.
AT&T Bell Laboratories
Davie James W.
Ranieri Gregory C.
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