31-10-2013 дата публикации
Номер: US20130287405A1
Принадлежит:
In one example embodiment, a DFB laser includes a substrate; an active region positioned above the substrate; a grating layer positioned above the active region, the grating layer including a portion that serves as a primary etch stop layer; a secondary etch stop layer positioned above the grating layer; and a spacer layer interposed between the grating layer and the secondary etch stop layer. 1. A distributed feedback (DFB) laser , comprising:a substrate;an active region positioned above the substrate;a grating layer positioned above the active region, the grating layer including a portion that serves as a primary etch stop layer;a secondary etch stop layer positioned above the grating layer; anda spacer layer interposed between the grating layer and the secondary etch stop layer.2. The DFB laser as recited in claim 1 , wherein:the secondary etch stop layer comprises indium gallium arsenide phosphide:the spacer layer comprises indium phosphide; andthe grating layer comprises indium gallium arsenide phosphide.3. The DFB laser as recited in claim 1 , wherein a thickness of the spacer layer is at least partly based upon the presence of the secondary etch stop layer.4. A TOSA comprising:a housing; and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the DFB laser as recited in positioned within the housing.'}5. An optical transceiver module comprising:{'claim-ref': {'@idref': 'CLM-00004', 'claim 4'}, 'the TOSA as recited in ;'}a ROSA; anda PCB in electrical communication with the TOSA and the ROSA. This application is a divisional of U.S. patent application Ser. No. 12/902,000, filed on Oct. 11, 2010, which is a divisional of U.S. patent application Ser. No. 12/138,361, filed on Jun. 12, 2008, which claims priority from U.S. Provisional Patent Application Ser. No. 60/943,782, filed Jun. 13, 2007, and entitled “DISTRIBUTED FEEDBACK LASER HAVING ENHANCED ETCH STOP FEATURES,” the contents of each of which are incorporated herein by reference in their entirety. ...
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