Coherent light generators – Particular beam control device – Tuning
Reexamination Certificate
2011-05-10
2011-05-10
Rodriguez, Armando (Department: 2828)
Coherent light generators
Particular beam control device
Tuning
C372S033000, C372S029020
Reexamination Certificate
active
07940819
ABSTRACT:
A tunable laser module includes a tunable laser section including a gain medium and a wavelength filter having a periodic characteristic which brings about a discontinuous variation of an oscillation wavelength, and a monitoring section adapted to output a monitoring signal which periodically varies in response to the oscillation wavelength of the tunable laser section. The monitoring section includes a monitoring wavelength filter having a periodic characteristic which defines the monitoring signal. The relationship between the period of the wavelength filter and the period of the monitoring wavelength filter is set such that the monitoring signal varies when the oscillation wavelength varies discontinuously.
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Ishikawa Tsutomu
Takabayashi Kazumasa
Tanaka Hirokazu
Eudyna Devices Inc.
Fujitsu Limited
Rodriguez Armando
Westerman Hattori Daniels & Adrian LLP
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