Wide ridge pump laser
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United States of America Patent
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Dec 31, 2002
Grant Date -
N/A
app pub date -
Dec 20, 1999
filing date -
Dec 20, 1999
priority date (Note) -
Expired
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Abstract
A laser pump module has a ridge waveguide chip with a ridge width that is greater than 4 micrometers (.mu.m). This is a relatively wide ridge for this class of laser chips. Specifically, especially for signal lasers, narrow ridge widths are used in order to control lateral and transverse mode shape and size. In the present invention, however, where a chip is used for pump applications, a wider ridge is used to increase the laser effective gain volume and decrease the loss associated with the lowest order transverse mode to thus maximize the useful power and light that is coupled into the fiber pigtail.
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