Isolation device between optically conductive areas

Details Isolation device between optically conductive areas Isolation device between optically conductive areas

G - Physics

02

B

G02B 6/12 (2006.01) G02B 6/122 (2006.01) H01L 21/761 (2006.01) H01L 21/762 (2006.01) G02B 6/42 (2006.01)

Patent

CA 2422572

An isolation device for providing optical and electrical isolating between optically conductive areas (1A, 1B9 such as parallel waveguides of an integrated optical chip comprising a first elongate region (4) doped with a first dopant material (p+), a second elongate region (5) on one side of the first elongate region (4) and a third elongate region (6) on the opposite side of the first elongate region (4), the second and third elongate regions (5, 6) being doped with a second dopant material (n+) of opposite polarity to the first dopant material (p+) so a first diode is formed between the second and first elongate regions (5, 4) and a second diode is formed between the first and third elongate regions (4, 6), the first and second diodes being connected in series with opposing polarity. The opposing diodes block the passage of electrical current and the doped regions (4, 5, 6) absorb light attempting to pass therethrough.

L'invention concerne un dispositif d'isolation con×u pour fournir une isolation optique et ~lectrique entre des zones ~ conduction optique (1A, 1B), telles que des guides d'ondes parall­les d'une puce optique int~gr~e. Ce dispositif comprend une premi­re r~gion allong~e (4) dop~e au moyen d'un premier dopant (p+), une deuxi­me r~gion allong~e (5) sur un cÙt~ de la premi­re r~gion allong~e (4) et une troisi­me r~gion allong~e (6) sur le cÙt~ oppos~ de la premi­re r~gion allong~e (4), la deuxi­me et la troisi­me r~gion allong~e (5, 6) ~tant dop~es au moyen d'un second dopant (n+) de polarit~ oppos~e ~ celle du premier dopant (p+). Une premi­re diode est form~e entre la deuxi­me et la premi­re r~gion allong~e (5, 4) et une seconde diode est form~e entre la premi­re et la troisi­me r~gion allong~e (4, 6), la premi­re et la seconde diode ~tant connect~es en s~rie avec une polarit~ oppos~e. Les diodes oppos~es bloquent le passage du courant ~lectrique et les r~gions dop~es (4, 5, 6) absorbent la lumi­re essayant de passer ~ travers.

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