{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9638940","patent":{"patent_number":"US-9638940","title":"Optical modulator with automatic bias correction","assignee":null,"inventors":[],"filing_date":"2016-05-24T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["G02F","G02F","G02F","G02F","H04B","G02F","G02F","G02F","H04B"],"num_claims":15,"abstract":"An optical modulator uses an optoelectronic phase comparator configured to provide, in the form of an electrical signal, a measure of a phase difference between two optical waves. The phase comparator includes an optical directional coupler having two coupled channels respectively defining two optical inputs for receiving the two optical waves to be compared. Two photodiodes are configured to respectively receive the optical output powers of the two channels of the directional coupler. An electrical circuit is configured to supply, as a measure of the optical phase shift, an electrical signal proportional to the difference between the electrical signals produced by the two photodiodes."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical modulator with automatic bias correction","description":"An optical modulator uses an optoelectronic phase comparator configured to provide, in the form of an electrical signal, a measure of a phase difference between two optical waves. The phase comparator","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9638940","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-9638940","citation_suggestion":"Patentable. \"Optical modulator with automatic bias correction\" (US-9638940). https://patentable.app/patents/US-9638940","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9638940","json":"https://patentable.app/api/llm-context/US-9638940","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:46:59.187Z"}