Light-emitting module

H - Electricity – 01 – S

Patent

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Details

H01S 5/0687 (2006.01) H01S 5/022 (2006.01)

Patent

CA 2374495

Provided is a light emitting module that capable of adjusting the wavelength of light generated under operating conditions. The light emitting module is provided with a semiconductor light emitting device 16, first and second photodetectors 20, and an etalon 18. The semiconductor light emitting device 16 has a first end face 16b and a second end face 16a, and an active layer between the first end face 16b and the second end face 16a, Each of the photodetectors 20a, 20b is located so as to receive transmitted light from the first end face 16b of the semiconductor light emitting device. The etalon 18 has a portion of a first thickness d1 located between the first end face 16b and the photodetector 20a, and a portion of a second thickness d2 located between the first end face 16b and the photodetector 20b. The first thickness d1 of the etalon 19 is different from the second thickness d2.

Cette invention a trait à un module source de lumière à longueur d'onde variable. Ce module comporte un dispositif à semi-conducteur émetteur de lumière (16), deux photodétecteurs (20) et un étalon (18). Le dispositif à semi-conducteur émetteur de lumière (16) possède deux extrémités (16b, 16a), une couche active se trouvant entre celles-ci. Les photodétecteurs (20a, 20b) sont agencés de manière à recevoir la lumière traversant la première extrémité (16b) du dispositif à semi-conducteur émetteur de lumière (16). L'étalon (18) est constitué d'une partie d'une première épaisseur (d1) placée entre la première extrémité (16b) et l'un des photodétecteurs (20a), ainsi que d'une seconde partie d'une seconde épaisseur (d2) placée entre la première extrémité (16b) et l'autre photodétecteur (20b). Les deux épaisseurs (d1, d2) de l'étalon (18) diffèrent l'une de l'autre.

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