Some modifications of the electro-optic Q- switching1,2 are simple and cheap alternatives to injection-seeded lasers in obtaining single-longitudinal mode operation. They are realized by using a light signal, ejected by an intracavity polarizing element, which triggers a Pockels cell (PC) driver. A high degree of probability for single-mode operation can be thus realized.

© 1991 Optical Society of America

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