Method, communication apparatus, and communication system
US-2015381284-A1 · Dec 31, 2015 · US
Optical transmission device, optical communication system and optical transmission method
US2025300740A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025300740-A1 |
| Application number | US-202218861684-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 10, 2022 |
| Priority date | May 10, 2022 |
| Publication date | Sep 25, 2025 |
| Grant date | — |
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Abstract
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Provided is an optical transmission device including: a modulation signal generation unit that generates an intensity modulation signal and a continuous phase frequency shift keying (CPFSK) signal; a light source that outputs a signal modulated by the CPFSK signal; and an intensity modulation unit that performs intensity modulation for canceling an intensity modulation component generated by modulation by the CPFSK signal, and intensity modulation by the intensity modulation signal, on the signal output from the light source.
First claim
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1 . An optical transmission device comprising: a modulation signal generator configured to generate an intensity modulation signal and a continuous phase frequency shift keying (CPFSK) signal; a light source configured to output a signal modulated by the CPFSK signal; and an intensity modulator configured to perform intensity modulation for canceling an intensity modulation component generated by modulation by the CPFSK signal, and intensity modulation by the intensity modulation signal, on the signal output from the light source. 2 . The optical transmission device according to claim 1 , further comprising a modulation degree changer configured to change a modulation degree of the intensity modulation signal. 3 . An optical communication system comprising: an optical transmission device including: a modulation signal generator configured to generate an intensity modulation signal and a continuous phase frequency shift keying (CPFSK) signal; a light source configured to output a signal modulated by the CPFSK signal; and an intensity modulator configured to perform intensity modulation for canceling an intensity modulation component generated by modulation by the CPFSK signal, and intensity modulation by the intensity modulation signal, on the signal output from the light source; and an optical reception device including: a receiver configured to perform polarization separation and phase separation on a signal received from the optical transmission device; and a signal processor configured to decode the intensity modulation signal and the CPFSK signal on a basis of signals subjected to the polarization separation and the phase separation. 4 . An optical transmission method comprising: generating an intensity modulation signal and a continuous phase frequency shift keying (CPFSK) signal; outputting a signal modulated by the CPFSK signal; and performing intensity modulation for canceling an intensity modulation component generated by modulation by the CPFSK signal, and intensity modulation by the intensity modulation signal, on the signal modulated by the CPFSK signal.
Assignees
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Classifications
Digital phase modulation · CPC title
Receivers · CPC title
- H04B10/5161Primary
Combination of different modulation schemes · CPC title
Details of coding or modulation · CPC title
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- What does patent US2025300740A1 cover?
- Provided is an optical transmission device including: a modulation signal generation unit that generates an intensity modulation signal and a continuous phase frequency shift keying (CPFSK) signal; a light source that outputs a signal modulated by the CPFSK signal; and an intensity modulation unit that performs intensity modulation for canceling an intensity modulation component generated by mo…
- Who is the assignee on this patent?
- Nippon Telegraph & Telephone
- What technology area does this patent fall under?
- Primary CPC classification H04B10/5161. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Sep 25 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).