Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Particular stable state circuit
Patent
1993-10-25
1995-10-10
Heyman, John S.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Particular stable state circuit
327270, 327438, H03K 3352
Patent
active
054574161
ABSTRACT:
A Q-switching drive circuit utilizing a magnetization curve characteristic of a saturation reactor, thereby capable of achieving a semipermanent use life, a rapid switching into a Q-switching opening phase voltage, a maintenance of the Q-switching opening phase voltage for a period of several hundreds nanoseconds. The Q-switching drive circuit can operate at a high repeat rate. An initial closing phase-delayed voltage is maintained in the Q-switching drive circuit so that a prelasing phenomenon is prevented from occurring upon oscillating the laser. The Q-switching drive circuit utilizes a magnetization curve characteristic of the saturation reactor so that a characteristic of a rapid return of the phase voltage from the opening state to the closing state can be obtained.
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M. K. Chun et al., "Laser: an electrooptically Q-switched Porro prism device", Applied Optics, vol. 15 (No. 8), 1942 (1976).
Sandra Giacomini et al., "Fast optical switching in a high power Nd:YAG", Applied Optics, vol. 26 (No. 16), 3179 (1987).
Robert Goldstein, "Electro-Optic Devices in Review", Lasers & Applications, vol. 5 (No. 4), pp. 67-73 (Apr., 1986).
J. T. Lin et al., "Choosing A Nonlinear Crystal", Lasers & Optronics, vol. 6 (No. 11), p. 59-63 (Nov., 1987).
Walter Koechner, "Solid-State Laser Engineering", 2nd Edition, Springer-Verlag, pp. 414-431 (1988).
Choi Young Soo
Kang Eung Cheol
Park Yong Chan
Song In Seob
Agency for Defense Development
Heyman John S.
Nu Ton My-Trang
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