{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9638574","patent":{"patent_number":"US-9638574","title":"Measurement apparatus and method of measuring signal light quality","assignee":null,"inventors":[],"filing_date":"2015-04-15T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["H04B"],"num_claims":6,"abstract":"There is provided a measurement apparatus of measuring signal light quality. The measurement apparatus may include: a tunable wavelength filter configured to be input signal lights having different power levels; a measure configured to measure an optical power level of light passing through the tunable wavelength filter; and a controller configured to calculate a non-linear noise component and a spontaneous emission component of a signal light based on the measured optical power levels, the optical power levels being measured at different transmission frequencies for each of the signal lights having the different power levels in response to a control of the transmission frequency of the tunable wavelength filter."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Measurement apparatus and method of measuring signal light quality","description":"There is provided a measurement apparatus of measuring signal light quality. The measurement apparatus may include: a tunable wavelength filter configured to be input signal lights having different po","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9638574","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-9638574","citation_suggestion":"Patentable. \"Measurement apparatus and method of measuring signal light quality\" (US-9638574). https://patentable.app/patents/US-9638574","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9638574","json":"https://patentable.app/api/llm-context/US-9638574","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:17:42.757Z"}