Method for maintaining mode-locked state of fabry-perot...

Details Method for maintaining mode-locked state of fabry-perot... Method for maintaining mode-locked state of fabry-perot...

2006-10-17

2006-10-17

Menefee, James (Department: 2828)

Coherent light generators

Particular beam control device

Mode locking

C398S079000

Reexamination Certificate

active

07123633

ABSTRACT:
A method for maintaining the mode-locked state of a Fabry-Perot (FP) laser and a WDM light source using the same method for use in WDM optical communication are disclosed. The mode-locked state can be maintained irrespective of temperature change, without use of a temperature controller, by spectrum-slicing the incoherent light generated by a light source element and injecting the spectrum-sliced light to the FP laser, then the FP laser amplifies and outputs only a lasing mode coinciding with the wavelength of the injected light, wherein a lasing-mode interval of the FP laser is set to be less than a 3 dB linewidth of the injected light, so that at least one lasing mode exists inside the 3 dB linewidth of the injected light irrespective of changes in external temperature.

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