Asymmetric waveguide electroabsorption-modulated laser

H - Electricity – 01 – S

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Details

H01S 5/026 (2006.01) H01S 5/10 (2006.01) H01S 5/125 (2006.01)

Patent

CA 2435330

A modulated laser device (110) comprising two or more vertically stacked asymmetric waveguides (114,116) is provided. The laser device (110) comprises a first waveguide (114) having a gain region formed therein for amplifying at least a first mode of light, and a second waveguide (116) vertically coupled to the first waveguide (114) and having a modulator (106) formed therein for modulating a second mode of light having an effective index of refraction different from the first mode. Light propagating in the first waveguide (114) is transferred into the second waveguide (116) via a lateral taper in the first waveguide (114). The laser device (110) may further comprise a third waveguide positioned between the first (114) and second waveguide (116) for providing isolation between the gain region (104) and modulator (106). Distributed bragg reflector (DBR) and distributed feedback (DFB) laser designs may be employed in the device.

L'invention concerne un dispositif à laser modulé comprenant deux ou plusieurs guides d'ondes asymétriques empilés verticalement. Le dispositif laser comprend un premier guide d'ondes comportant une région de gain formée à l'intérieur du guide d'ondes, permettant d'amplifier au moins un premier mode de lumière, et un second guide d'ondes couplé verticalement au premier guide d'ondes, et comportant un modulateur formé à l'intérieur du dernier guide d'ondes, permettant de moduler un second mode de lumière, présentant un indice de réfraction efficace différent du premier mode. La propagation de la lumière dans le premier guide d'ondes est transférée jusqu'au second guide d'ondes par le biais d'un raccord progressif latéral dans le premier guide d'ondes. Le dispositif laser peut également comprendre un troisième guide d'ondes positionné entre le premier et le second guide d'ondes permettant de fournir une isolation entre la région de gain et le modulateur. Des conceptions laser de réflecteur Bragg réparties (DBR) et un résonateur distribué (DFB) peuvent être employés dans le dispositif.

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