NO920406L - AA MONITORING MONITORING MONITORING AN OPTICAL CHAIRMAN - Google Patents
AA MONITORING MONITORING MONITORING AN OPTICAL CHAIRMANInfo
- Publication number
- NO920406L NO920406L NO92920406A NO920406A NO920406L NO 920406 L NO920406 L NO 920406L NO 92920406 A NO92920406 A NO 92920406A NO 920406 A NO920406 A NO 920406A NO 920406 L NO920406 L NO 920406L
- Authority
- NO
- Norway
- Prior art keywords
- monitoring
- monitoring circuit
- fiber
- chairman
- optical
- Prior art date
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
En overvåkningsenhet (1) for å detektere fysisk påvirk- ning på en kommunikasjonsfiber (4) i et transmisjonssystem (2), omfatter en overvåkningskrets (9) koplet til kommunika- sjonsfiberen (4). En del av et signal som sendes langs kommunikasjonsfiberen (4), koples ut av fiberen 4 og inn i overvåkningsenheten (1). Et filter (8) tillater bare en av de to ortogonalt polariserte feltkomponentene å passere gjennom seg til overvåkningskretsen (9). Ved å detektere fluktuasjo- ner i polarisasjons-tilstanden for det filtrerte optiske signalet, tillater overvåkningskretsen (9) at deteksjon av ytre påvirkninger kan bestemmes.A monitoring unit (1) for detecting physical influence on a communication fiber (4) in a transmission system (2) comprises a monitoring circuit (9) coupled to the communication fiber (4). A portion of a signal sent along the communication fiber (4) is unplugged from the fiber 4 and into the monitoring unit (1). A filter (8) allows only one of the two orthogonally polarized field components to pass through it to the monitoring circuit (9). By detecting fluctuations in the polarization state of the filtered optical signal, the monitoring circuit (9) allows detection of external influences to be determined.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB898917488A GB8917488D0 (en) | 1989-07-31 | 1989-07-31 | A monitor unit for monitoring an optical waveguide |
PCT/GB1990/001180 WO1991002416A1 (en) | 1989-07-31 | 1990-07-30 | A monitor unit for monitoring an optical waveguide |
Publications (2)
Publication Number | Publication Date |
---|---|
NO920406D0 NO920406D0 (en) | 1992-01-30 |
NO920406L true NO920406L (en) | 1992-03-31 |
Family
ID=26295685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO92920406A NO920406L (en) | 1989-07-31 | 1992-01-30 | AA MONITORING MONITORING MONITORING AN OPTICAL CHAIRMAN |
Country Status (1)
Country | Link |
---|---|
NO (1) | NO920406L (en) |
-
1992
- 1992-01-30 NO NO92920406A patent/NO920406L/en unknown
Also Published As
Publication number | Publication date |
---|---|
NO920406D0 (en) | 1992-01-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2110700A1 (en) | Determination of induced change of polarization state of light | |
EP0314373A3 (en) | Lightwave systems using optical amplifiers | |
GB2207827B (en) | Fault monitoring system for optical fiber communication systems | |
US4761050A (en) | Optical switching device including polarization preserving coupler utilizing Kerr effect and method of using same | |
CA2151535A1 (en) | Optical Fiber Distribution Frame with Fiber Testing | |
CA2000997A1 (en) | Heterodyne receiver for coherent optical communication | |
EP1335466A3 (en) | Self-powered apparatus and method for optically detecting arcing faults in electric power systems in the presence of other light sources | |
ES8302956A1 (en) | Receiving system for orthogonally polarized HF signals. | |
SE8304733L (en) | DEVICE TO DETECT LIGHT ENERGY DRAINAGE FROM OPTICAL FIBERS | |
CN104897368B (en) | Polarization maintaining optical fibre extinction ratio real-time test device | |
US5258615A (en) | Optical fiber monitoring by detection of polarization variations | |
NO920406L (en) | AA MONITORING MONITORING MONITORING AN OPTICAL CHAIRMAN | |
ATE30967T1 (en) | OPTICAL DETECTION ARRANGEMENTS USING POLARIZED LIGHT. | |
EP0322893A2 (en) | A polarization diversity optical receiving apparatus | |
TW349174B (en) | Optical circulator | |
CA2213421A1 (en) | Method and arrangement for measuring a magnetic field using the faraday effect, with compensation for intensity changes | |
EP0543577A3 (en) | Local loss test set for optical fibre | |
EP0439551B1 (en) | Optical signal processor | |
JPS5622404A (en) | Optical switch monitor system | |
ATE134464T1 (en) | OPTICAL WAVEGUIDE MONITORING UNIT | |
JPH03148606A (en) | Optical reception module | |
CA2068901A1 (en) | Device for measuring current by optic fiber | |
JP2717410B2 (en) | Optical demodulator | |
JPS55156902A (en) | Partly transmittable mirror channel-connecting photo switch having photodetector | |
JPS5757231A (en) | Monitor ing device of degree of vacuum for vacuum circuit breaker |