Cascade thermo-optical device
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United States of America Patent
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-
Nov 20, 2001
Grant Date -
N/A
app pub date -
Dec 2, 1997
filing date -
Jun 2, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention pertains to a thermo-optical device comprising a waveguiding structure (1) which comprises at least one input light path (2) and at least two output light paths (3,3') forming a first y-splitter (4), at least one output light path (3,3') being provided with primary heating elements (5,5'), characterised in that the output light paths (3,3') are provided with an additional branch (6) forming a second y-splitter (7), wherein at least one of the branches (6,6') is provided with a secondary heating element (8,8'). The additional branches (6) may be positioned in the opposite direction, such that in each of the second y-splitters (7) one branch (6') coincides with one of the output light paths (3,3') of the first y-splitter (4).
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