mixed_signal_notes_set_9

Mixed_signal_notes_s - ECE145C/218C notes M Rodwell copyrighted 2008 High Speed Mixed Signal IC Design notes set 9 ICs for Optical Transmission

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ECE145C /218C notes, M. Rodwell, copyrighted 2008 High Speed Mixed Signal IC Design notes set 9 ICs for Optical Transmission Mark Rodwell University of California, Santa Barbara [email protected] 805-893-3244, 805-893-3262 fax
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ECE145C /218C notes, M. Rodwell, copyrighted 2008 ICs for Optical Transmission: topics Systems: block diagrams, eye diagrams, waveforms Transmitters: Laser diodes, diode drivers Optical modulators, modulator drivers Receivers Photodiodes Receiver block diagrams: AGC and limiting AGC amplifier and detector, SNR constraints on limiting amplifier design Limiting amplifiers TIA: SNR analysis, topologies DC restoration loops SNR analysis; Personik Integrals Timing recovery PLLs, phase detectors for data steams, frequency locking Mux and Demux basic structures, timing thereof
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ECE145C /218C notes, M. Rodwell, copyrighted 2008 Digital Optical Fiber Links demux receiver, er, transmitt mux, : link optical of form Typical nm) @1550 dB/km 0.17 nm, @1310 dB/km 0.3 (~ losses low have fibers Optical effect) skin notes; (see s frequencie high at losses high have es Copper wir : Motivation detection (power) Incoherent (On/Off) Modulation Intensity Binary ion transmiss Digital : (2008) operation of Mode Prevalent
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ECE145C /218C notes, M. Rodwell, copyrighted 2008 Typical Signal Format: NRZ Modulation optical,0 optical,1 / ratio Extinction zero quite not is "0" for intensity Modulated sent. 0 vs 1 e communicat low to / high modulated is Intensity period, bit each In P P = sequences possible all for ctories data traje Represents period. bit one modulo time vs. waveform represents pattern Eye
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ECE145C /218C notes, M. Rodwell, copyrighted 2008 Optical Transmitter: Directly Modulated Laser Diode exceeded. is current d threshol once slowly only increases voltage forward at except th diode, a PN of those resemble stics characteri V - I diode Laser Hz in frequency optical , efficiency quantum ) )( / ( : shold laser thre exceeds current drive n output whe light in increase sharp a shows Diode current. drive AC and bias of ion superposit by driven is Diode = = ν η th optical I I q h P
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ECE145C /218C notes, M. Rodwell, copyrighted 2008 Laser Diode Characteristics links. speed - high range - long for attractive less lasers makes (chirp) modulation h wavelengt Undesired (2008). bandwidth GHz 25 exceed
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This note was uploaded on 12/29/2011 for the course ECE 594A taught by Professor Rodwell during the Fall '09 term at UCSB.

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Mixed_signal_notes_s - ECE145C/218C notes M Rodwell copyrighted 2008 High Speed Mixed Signal IC Design notes set 9 ICs for Optical Transmission

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