Some Research On The Multi-wavelength Signals Buffering System Based On Dual Loop Coupling

All-optical buffer can complete the storage of data packets in the optical domain without light-electricity-light transformation, overcoming the electronic speed bottleneck of the existing communication network effectively. It has become one of the research focuses of all-optical communications. With the rapid development of WDM network technology, optical buffer can be used for multi-wavelength is in need. The all-optical buffer based on dual loop optical buffer (DLOB) is a novel optical buffer, which is variable, compact, low cost and easy to operate. DLOB based multi-wavelength caching system has also been raised up, but there still were several problems. In this paper, based on previous work,we rebuilt a multi-wavelength signal buffering system based on DLOB, proposed some corresponding solutions to the problems existing in the system, and at last eight wavelengths 2.5Gps random overlapping signals simultaneous buffering has be achieved. The work of this paper includes:1. The multi-wavelength amplification characteristics, cross-gain and noise characteristics of SOA were studied carefully. The power equalization effect of multi-wavelength overlapping signals in SOA switch was studied theoretically and experimentally.2. Demonstrated the power control technologies of multi-wavelength signal buffering system. The EDFA gain and noise control was achieved by using feedback structure; the wavelengths of fiber grating were calibrated successful by using stress conditioning technology;3. Carried out multi-wavelength signal buffering experiment, successfully achieved 8×2.5Gbps 4 cycles 7.02us buffering; a brief analysis of the impact of multi-wavelength signal caching system performance reasons.