Patent ID: 7869475

Claim:
An external-cavity laser module comprising a thermoelectric cooler comprising an upper carrier plate including an upper surface and being configured to stabilise the temperature of said upper surface, wherein said upper surface has a first length along a main longitudinal direction; a thermally conductive platform in thermal coupling with the upper surface of the thermoelectric cooler and having a second length along said main longitudinal direction; a laser assembly comprising a gain medium for emitting an optical beam into the external cavity, said gain medium being placed in thermal contact with said thermally conductive platform; a thermally conductive intermediate plate arranged between said upper carrier plate and said thermally conductive platform, said intermediate plate being in thermal coupling with both the upper carrier plate and the thermally conductive platform and having a third length along said main longitudinal direction, wherein said third length is smaller than said first length and wherein a mechanical contact between the thermally conductive platform and the upper surface takes place only through said intermediate plate and wherein the ratio between said third length of said intermediate plate and said first length of said upper surface is comprised between 0.5 and 0.65.