Temperature-compensation optical communication interference...

Details Temperature-compensation optical communication interference... Temperature-compensation optical communication interference...

G - Physics

02

B

G02B 27/10 (2006.01) G02B 6/12 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2462844

A temperature-compensation optical communication interference device comprises first and second optical paths (P1, P2) and a beam splitter (123) disposed at one ends of the first and second optical paths (P1, P2). A first mirror (124) is disposed at the other end of the first optical path (P1). A second mirror (125) is disposed at the other end of the second optical path (P2). The beam splitter (123) and the first and second mirrors (124, 125) are arranged on a base (126). The base (126) is composed of members (126a, 126b, 126c). The sign of the coefficient of linear expansion of the member (126a) is opposite to that of the members (126b, 126c). The beam splitter (123) and the first and second mirrors (124, 125) are separately arranged on the members (126a, 126b, 126c), respectively. Therefore, the dependence of the difference between the optical path lengths of the first and second optical paths on temperature can be lowered.

L'invention concerne un dispositif destiné à l'interférence des communications optiques à compensation thermique, ledit dispositif comprenant des première et seconde voies optiques (P¿1?, P¿2?) et un diviseur de faisceaux (123) placé à une extrémité desdites voies optiques (P¿1?, P¿2?). Un premier miroir (124) est placé au niveau de l'autre extrémité de la première voie optique (P¿1?). Un second miroir (125) est disposé à l'autre extrémité de la seconde voie optique (P¿2?). Le diviseur de faisceaux (123) et les premier et second miroirs (124, 125) sont placés sur une base (126). La base se compose d'éléments (126a, 126b, 126c). Le signe du coefficient de l'expansion linéaire de l'élément (126a) est opposé à celui des autres éléments (126b, 126c). Le diviseur de faisceaux (123) et les premier et second miroirs (124, 125) sont disposés séparément et respectivement sur les éléments (126a, 126b, 126c). Ainsi, la dépendance de la différence entre les longueurs des première et seconde voies optiques sur le plan thermique peut être abaissée.

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