Extended optical fiber line testing system using new eight-channel L/U-band crossed optical waveguide coupler for L-band WDM transmission

This paper describes the system design for an extended optical fiber line testing system that uses a new L/U-band crossed optical waveguide coupler and a fiber Bragg grating filter for L-band wavelength-division multiplexing transmission. We describe the reflection characteristic required for optical filters located in central offices in order to suppress the ghost signal caused by multireflection in the optical time-domain reflectometry (OTDR) trace. We design and evaluate an eight-channel crossed optical waveguide coupler with a new thin dielectric film filter that separates a 1650-nm test light from the L-band communication light, and confirm that there was no degradation caused by multireflections in the OTDR trace. We also demonstrate the in-service line monitoring of a 10-Gb/s L-band transmission with no degradation in the transmission quality.

[1]  S. Namiki,et al.  Broadband lossless DCF using Raman amplification pumped by multichannel WDM laser diodes , 1998 .

[2]  Juichi Noda,et al.  Dielectric multilayered interference filters deposited on polyimide films , 1991 .

[3]  N. Hanik,et al.  Field demonstration of a transparent optical 10 Gbit/s-WDM-network based on normalized transmission sections , 2002, Optical Fiber Communication Conference and Exhibit.

[4]  T. Koonen,et al.  Optical Networking in the Access and Residential Environment - Technologies and Challenges , 2002, 2002 28TH European Conference on Optical Communication.

[5]  M. Tachikura.  Newly developed optical fiber distribution system and cable management in central office , 2001 .

[6]  Takashi Ebihara,et al.  Novel automatic remote fiber line testing system and new fiber termination module for expanding local subscriber loops , 1996, Proceedings of European Conference on Optical Communication.

[7]  S. K. Nielsen,et al.  SRS induced depletion of 1540 nm signal co-propagating with 1630 nm OTDR pulses , 1996 .

[8]  S. Namiki,et al.  Broadband Raman Amplifier for WDM , 2001 .

[9]  K. Fukuchi,et al.  10.92-Tb/s (273/spl times/40-Gb/s) triple-band/ultra-dense WDM optical-repeatered transmission experiment , 2001, OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171).

[10]  Dennis Derickson,et al.  Fiber optic test and measurement , 1998 .

[11]  S. Gray.  Transient gain dynamics in wide bandwidth discrete Raman amplifiers , 2002, Optical Fiber Communication Conference and Exhibit.

[12]  Nobuo Tomita,et al.  Design and performance of a novel automatic fiber line testing system with OTDR for optical subscriber loops , 1994 .

[13]  Kiyoshi Fukuchi.  Wideband and ultra-dense WDM transmission technologies toward over 10-Tb/s capacity , 2002, Optical Fiber Communication Conference and Exhibit.

[14]  N. Nakao,et al.  Maintenance method using 1650-nm wavelength band for optical fiber cable networks , 2001 .

[15]  Govind P. Agrawal,et al.  Nonlinear Fiber Optics , 1989 .

[16]  Alberto Bononi,et al.  Transient gain dynamics in saturated counter-pumped Raman amplifiers , 2002, Optical Fiber Communication Conference and Exhibit.