Font Size: a A A

All Optical Buffer Based On Semiconductor Optical Amplifier

Posted on:2012-09-24Degree:DoctorType:Dissertation
Country:ChinaCandidate:Y C ZhangFull Text:PDF
GTID:1228330392458269Subject:Electronic Science and Technology
Abstract/Summary:PDF Full Text Request
The explosive growth of the data communication volume requires greatertransmission capacity and higher transmission rate. At present, the rate of electronicexchange is about hundreds of megabits per second, and in the future the use ofgermanium arsenide technology will improve the rate by over one hundred times, butcompared to data rate in the large-capacity and high-speed all-optical network, the rateis still very low. All-optical buffer is one of the problems which all-opticalnetwork needs to solve at this stage. This PhD thesis is about all optical buffer basedon semiconductor optical amplifier, which could sreve multiple packets.This thesis firstly studied all-optical threshold function and all-optical1×2wavelength router. Optical threshold function is build up by two semiconductor opticalamplifierfiber ring lasers, the extinction ratio between the two states is about35dB, andswitching time is only2-3ring cavity cycles. All-optical1×2wavelength router isbased on SOA cross-gain modulation and10Gb/s data rate for error-free output isachieved. Based on all-optical threshold function and all-optical1×2wavelength router,all-optical stack buffer is experimentally demonstrated at2.5Gb/s and10Gb/s datarates, and the corresponding bit error rate is measured.According to the shortage of the all-optical stack buffer, this thesis proposed anddemonstrated the improved all-optical stack buffer. The bit error rate test result isimproved significantly, the improved all-optical stack buffer could buffer packet forover3cycles with the power penalty less than2dB at10Gb/s data rate when the biterror rate is10-9.In this thesis, the theoritical model of the SOA based stack buffer is built up. Theextinction ratio degradation and pattern effects induced by the cross-gain modulation insemiconductor optical amplifiers and the bit noise of the output of the optical thresholdfunction are analyzed. And the properties of the all-optical stack buffer used in theoptical node were studied.This thesis also proposed two all-optical queue buffer schemes, which are bothusing packets as the control signal. All-optical queue buffer is more simple and costlesscompared to the all-optical stack buffer, and which is very promising to be used in non-synchronous optical network while the packet length is unfixed.
Keywords/Search Tags:all optical network, all optical buffer, semiconductor opticalamplifier, optical stack buffer
PDF Full Text Request
Related items