{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8472811","patent":{"patent_number":"US-8472811","title":"Variable optical attenuator integration into transmitter optical subassemblies","assignee":null,"inventors":[],"filing_date":"2011-03-28T00:00:00.000Z","publication_date":"2013-06-25T00:00:00.000Z","cpc_codes":["H04B","G02F","G02F"],"num_claims":18,"abstract":"A small-scale VOA system includes a polarization rotator, a voltage multiplier circuit, and at least one transistor. The polarization rotator can be positioned within a TOSA along the emission axis of a corresponding optical signal source in addition to one or more polarizers. A microcontroller provides a first low voltage control signal to a voltage multiplier to generate a large voltage DC signal which is provided to the transistor. The transistor modulates the large voltage signal with a second control signal from the microcontroller to generate a large voltage AC signal for driving the polarization rotator. The polarization rotation of the polarization rotator can be altered depending on the applied large-voltage AC signal. As a result, the polarization rotator and one or more polarizers can variably attenuate signals emitted by the optical signal source or act as a shutter."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Variable optical attenuator integration into transmitter optical subassemblies","description":"A small-scale VOA system includes a polarization rotator, a voltage multiplier circuit, and at least one transistor. The polarization rotator can be positioned within a TOSA along the emission axis of","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8472811","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8472811","citation_suggestion":"Patentable. \"Variable optical attenuator integration into transmitter optical subassemblies\" (US-8472811). https://patentable.app/patents/US-8472811","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8472811","json":"https://patentable.app/api/llm-context/US-8472811","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T23:10:26.289Z"}