Method and device for locking the wavelength of an optical...

H - Electricity – 04 – B

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H04B 10/145 (2006.01) G02B 6/34 (2006.01) H01S 3/137 (2006.01) H01S 3/139 (2006.01) H01S 5/0687 (2006.01) H04B 10/155 (2006.01) H01S 3/13 (2006.01)

Patent

CA 2394655

Device for locking the wavelength of an optical signal emitted by a source, comprising: a coupler (2) capable of extracting a fraction of the said optical signal, a splitter (4) capable of dividing the said fraction of the said optical signal into a first sub-fraction and a second sub-fraction, a first filter (FP1) capable of filtering the said first sub-fraction and of generating an optical signal when its wavelength is displaced to values below the wavelength of the optical signal to be locked, a second filter (FP2) capable of filtering the said second sub-fraction and of generating an optical signal when its wavelength is displaced to values above the wavelength of the optical signal to be locked, an opto-electronic device (6) capable of converting the said first filtered sub-fraction of the optical signal and the said second filtered sub-fraction of the optical signal, and of generating a signal corresponding to the said size of the displacement and a signal identifying the direction of the said displacement, both of which are to be used to adjust the emission spectrum of the said source.

L'invention concerne un dispositif destiné à bloquer la longueur d'onde d'un signal optique émis par une source et comprenant: un coupleur (2) capable d'extraire une fraction dudit signal optique, un diviseur (4) capable de diviser ladite fraction dudit signal optique en une première sous-fraction et en une deuxième sous-fraction, un premier filtre (FP1) capable de filtrer ladite première sous-fraction et de générer un signal optique lorsque sa longueur d'onde est déplacée vers des valeurs inférieures à la longueur d'onde du signal optique à bloquer, un second filtre (FP2) capable de filtrer ladite deuxième sous-fraction et de générer un signal optique lorsque sa longueur d'onde est déplacée vers des valeurs supérieures à la longueur d'onde du signal optique à bloquer, un dispositif opto-électronique (6) capable de convertir ladite première sous-fraction filtrée du signal optique et ladite deuxième sous-fraction filtrée du signal optique, et de générer un signal correspondant à ladite longueur de déplacement et un signal identifiant la direction dudit déplacement, ces deux signaux devant être utilisés pour ajuster le spectre d'émission de ladite source.

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