External cavity laser

G - Physics – 02 – B

Patent

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Details

G02B 6/12 (2006.01) H01S 5/026 (2006.01) H01S 5/02 (2006.01) H01S 5/022 (2006.01) H01S 5/14 (2006.01) H01S 5/40 (2006.01)

Patent

CA 2336981

An external cavity laser comprising first and second feedback means with an optical gain medium (2) therebetween, one of the feedback means is provided by a grating (4) formed in a silicon waveguide and the other feedback means is provided by a reflective back facet (2B) of the optical gain medium (2). The output wavelength of the laser, at a given temperature, can thus be determined during its manufacture and the laser can be made by mass production techniques. The grating (4) may be thermally isolated to obviate the need for temperature control means (6) to control the temperature of the grating (4). An array of lasers may be provided on a single chip.

L'invention concerne un laser à cavité externe qui comprend un premier et un deuxième systèmes de rétroaction entre lesquels est placé un support à gain optique (2), un des systèmes de rétroaction étant muni d'une grille (4) formée dans un guide d'ondes en silicium, le deuxième système de rétroaction étant muni d'une facette arrière réfléchissante (2b) du support à gain optique (2). La longueur d'onde de sortie du laser à une température donnée peut ainsi être déterminée au stade de fabrication, le laser pouvant être produit par des techniques de production en série. La grille (4) peut être isolée thermiquement, ce qui évite d'utiliser un système de régulation de température (6) destiné à réguler la température de la grille (4). On peut munir une puce unique d'un réseau de lasers.

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