Alcatel

Avanex Corporation

Franck Le Gall

Daniel Mousseaux

The invention is related to an optical device having a housing () with a defined gas atmosphere. The housing includes a wavelength monitor, for monitoring an optical signal The wavelength monitor includes an etalon () with a gap between two etalon plates. The optical device also has a laser diode and means for influencing the temperature () of the laser diode. The optical device further includes special means to influence the gas density in the gap between the etalon plates.

Optical device with wavelength monitor

The invention is related to a wavelength stabilization monitor ( ): with a laser source ( ), two photodiodes ( ) in different light paths, and a wavelength filter ( ), with a collimating element ( ) and at least the collimating element ( ) that can be moved in relation to the laser source ( ).

Wavelength stabilization monitor and method for adjusting the working wavelength of said monitor

A method of stabilizing the wavelength of lasers comprising a control circuit is proposed, wherein the light of the laser passes through a splitter and the split light passes through a wavelength filter in a first branch, and the light of both branches is in each case received by a photodetector. The photodetector of the first branch can be operated with different gain factors. The wavelength filter has a free spectral region which is greater than the spacing between the individual wavelengths in a wavelength division multiplex.

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Paris, France

Franck Le Gall