Zobrazeno 1 - 10
of 137
pro vyhledávání: '"Y. Koyamada"'
Publikováno v:
IEEE Journal of Quantum Electronics. 31:1038-1046
Publikováno v:
2008 SICE Annual Conference.
We have developed a prototype Brillouin optical time-domain reflectometry (BOTDR) system, called a double-pulse BOTDR (DP-BOTDR) system, for measuring distributed strain and temperature along fiber with a sub-meter spatial resolution. Oscillatory and
Publikováno v:
SICE Annual Conference 2007.
A novel Brillouin optical time-domain reflectometry (BOTDR) system, called a double-pulse BOTDR (DP-BOTDR) system, is proposed for measuring distributed strain and temperature in a fiber with a sub-meter spatial resolution. The DP-BOTDR system transm
Publikováno v:
Proceedings of 5th Conference on Optical Hybrid Access Networks.
A remote access and measurement system which uses wavelength division multiplexing (WDM) techniques is proposed for a passive double star network (PDSN). This system is used to demonstrate fault detection and location. In transmission experiments for
Publikováno v:
International Topical Meeting on Microwave Photonics. MWP '96 Technical Digest. Satellite Workshop (Cat. No.96TH8153).
Broadband absolute frequency synthesis of over 1.4 THz with a 10 GHz spacing is demonstrated for pulsed coherent lightwaves. It is based on the recirculation of a rectangular pulse around an amplified fiber-optic loop with a high-speed external phase
Publikováno v:
Conference Proceedings. 10th Anniversary. IMTC/94. Advanced Technologies in I & M. 1994 IEEE Instrumentation and Measurement Technolgy Conference (Cat. No.94CH3424-9).
1.6 /spl mu/m band optical time-domain reflectometry (OTDR) using a heterodyne detection technique is reported. Through the simultaneous use of a Raman fiber amplifier (RFA), an OTDR dynamic range of 11.5 dB was achieved with a spatial resolution of
Publikováno v:
Conference Proceedings. 10th Anniversary. IMTC/94. Advanced Technologies in I & M. 1994 IEEE Instrumentation and Measurement Technolgy Conference (Cat. No.94CH3424-9).
This paper describes a coherent optical time domain reflectometer (OTDR) with a high dynamic range for locating faults in optical cable systems incorporating repeaters based on erbium-doped fiber amplifiers (EDFA). We also present experimental result
Publikováno v:
IEEE Photonics Technology Letters. 4:64-66
A synchronous Raman fiber amplifier is proposed which is pumped at a wavelength around 1.55 mu m by output pulses from an erbium-doped fiber amplifier. This arrangement achieves an output optical peak power exceeding 200 mW and a 3-dB net gain bandwi
Publikováno v:
IEEE Photonics Technology Letters. 3:1039-1041
Rayleigh backscattering in a single-mode optical fiber was measured by coherent optical frequency-domain reflectometry (C-OFDR) employing a frequency-variable distributed-feedback laser diode (DFB-LD). Backscattered power from the neighborhood of the
Publikováno v:
IEEE International Conference on Communications, Including Supercomm Technical Sessions.
The authors present an overview of a flexible network architecture for fiber-optic subscriber loops, and review the basic environment for centralized and automated network operation. A surveillance and test system for the optical fiber network is als