Optical gain equalizer, and optical amplifier and...

H - Electricity – 01 – S

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H01S 3/06 (2006.01) H01S 3/067 (2006.01) H01S 3/10 (2006.01) H04B 10/17 (2006.01) H04B 10/18 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2303219

Etalon filters (1) and one or more fiber gratings (2) or dielectric multilayer filters (3) are arranged in line. A beam of light externally applied is passed through them and outputted to the outside. One of the etalon filters (1) is an etalon filter (1) having a sinusoidal wave loss characteristic of the same amplitude and period as those of the term obtained by Fourier series expansion of the loss wavelength characteristic for gain flattening. The one or more fiber gratings (2) or dielectric multilayer filters (3) compensate the ripple component remaining as the difference between the loss wavelength characteristic for gain flattening and the loss wavelength characteristic owing to the etalon filters (1). An optical amplifier apparatus (14) comprises such an optical gain equalizer (4) and an optical amplifier (5). A wavelength- division multiplex transmitter comprises this optical amplifier apparatus (14).

Des filtres étalon (1) et un ou plusieurs réseaux de fibres (2) ou filtres multicouches diélectriques (3) sont disposés en ligne. Ils sont traversés par un faisceau appliqué sur l'extérieur et qui ressort vers l'extérieur. L'un des filtres étalon (1) se caractérise par une perte d'onde sinusoïdale de même amplitude et période que pour le terme résultant de l'expansion par série de Fourier de la caractéristique de perte de longueur d'onde sinusoïdale en cas de compression de gain. Les réseaux de fibres (2) ou filtres multicouches diélectriques (3) corrigent le composant d'ondulation restant en tant que différence entre la caractéristique de perte de longueur d'onde en cas de compression de gain et la caractéristique de perte de longueur d'onde due aux filtres étalon (1). Un appareil d'amplification optique (14) comporte un tel égaliseur de gain optique (4) et un amplificateur optique (5) selon l'invention. Un émetteur multiplex en longueur d'onde comporte ledit appareil d'amplification optique (14).

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