GB2257319B - Direct demodulation of optical binary fsk signals - Google Patents
Direct demodulation of optical binary fsk signalsInfo
- Publication number
- GB2257319B GB2257319B GB9113938A GB9113938A GB2257319B GB 2257319 B GB2257319 B GB 2257319B GB 9113938 A GB9113938 A GB 9113938A GB 9113938 A GB9113938 A GB 9113938A GB 2257319 B GB2257319 B GB 2257319B
- Authority
- GB
- United Kingdom
- Prior art keywords
- fsk signals
- binary fsk
- optical binary
- direct demodulation
- demodulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/676—Optical arrangements in the receiver for all-optical demodulation of the input optical signal
- H04B10/677—Optical arrangements in the receiver for all-optical demodulation of the input optical signal for differentially modulated signal, e.g. DPSK signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/14—Demodulator circuits; Receiver circuits
- H04L27/156—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width
- H04L27/1563—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width using transition or level detection
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optical Communication System (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9113938A GB2257319B (en) | 1991-06-27 | 1991-06-27 | Direct demodulation of optical binary fsk signals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9113938A GB2257319B (en) | 1991-06-27 | 1991-06-27 | Direct demodulation of optical binary fsk signals |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9113938D0 GB9113938D0 (en) | 1991-08-14 |
GB2257319A GB2257319A (en) | 1993-01-06 |
GB2257319B true GB2257319B (en) | 1995-01-18 |
Family
ID=10697461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9113938A Expired - Fee Related GB2257319B (en) | 1991-06-27 | 1991-06-27 | Direct demodulation of optical binary fsk signals |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2257319B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2320635A (en) * | 1996-12-19 | 1998-06-24 | Northern Telecom Ltd | Optical timing detection using an interferometer |
GB9813412D0 (en) | 1998-06-23 | 1998-08-19 | Cambrian Systems Corp | Optical FSK modulation and demodulation based on the thermal chirp for optical path overhead transfer using asymmetrical mach-zehnder interferometer |
US6201632B1 (en) * | 1999-05-28 | 2001-03-13 | Trw Inc. | Feed forward optical frequency/phase demodulator |
EP2011258B1 (en) | 2006-04-26 | 2017-05-17 | Oclaro, Inc. | Partial dpsk (pdpsk) transmission systems |
EP1912355B1 (en) * | 2006-10-13 | 2010-09-08 | Alcatel Lucent | Method and receiver to increase the spectral efficiency of DPSK modulation format |
WO2008130674A1 (en) | 2007-04-20 | 2008-10-30 | Optium Corporation | Method and apparatus for dispersion mitigation in optical links |
US9325425B2 (en) | 2008-02-24 | 2016-04-26 | Finisar Corporation | Method and apparatus for demodulating and regenerating phase modulated optical signals |
US8320777B2 (en) | 2008-05-08 | 2012-11-27 | Finisar Corporation | Temperature controlled interferometer for phase demodulation |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2198904A (en) * | 1986-10-23 | 1988-06-22 | Plessey Co Plc | Optical fsk demodulator |
-
1991
- 1991-06-27 GB GB9113938A patent/GB2257319B/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2198904A (en) * | 1986-10-23 | 1988-06-22 | Plessey Co Plc | Optical fsk demodulator |
Also Published As
Publication number | Publication date |
---|---|
GB2257319A (en) | 1993-01-06 |
GB9113938D0 (en) | 1991-08-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950627 |