KYLIA mint: DLI // DPSK d DLI // DPSK demodulator d l t Table of - PowerPoint PPT Presentation

KYLIA mint: DLI // DPSK d DLI // DPSK demodulator d l t

Table of contents Table of contents • Optical layout O ti l l t • Phase tuning features • Packagings vs FSR • Some available options Some available options 2

Optical layout Optical layout Phase tuning U-version: piezo actuator element L-version: resitor IN IN Out1 Out2 3

Phase tuning: U-version piezo Phase tuning: U version piezo electric element • U :ultrafast response piezo U :ultrafast response, piezo based. » Helpful for fast shifting systems ( instability of the laser for instance). • The dli can adapt itself instantaneously to the i t t l t th environment, if a closed loop between BER and phase shifting (for instance) is set shifting (for instance) is set up. This solution is mainly used in labs. » Tuning 0.03µm/V ; 1FSR for g µ ; Example of tuning speed of U-version Example of tuning speed of U version 52 V » Tuning speed 0->100% 20µs 4

Phase tuning:L-versions Phase tuning:L versions (thermoelectrical) • • Phase shift is obtained with a resistive Phase shift is obtained with a resistive heater placed on an optical piece. Changing the voltage changes the local temperature and thus changes the index, which changes the delay, that gives a shift. » SHIFT(degrees)= 50.V^2 • • Where V is applied voltage Where V is applied voltage » Stability :Dshift=100.V.dV • Example : › 5V over 8 bits= precision of 5/256 = 20mV 5/256 20 V › Pour un shift de 180°=2V › Precision of 4° » Power consumption • P(mW)=30.V^2. 0.00E+00 2.00E+03 4.00E+03 6.00E+03 8.00E+03 1.00E+04 1.20E+04 • Pmax=0.5W (V=4Volts) » Speed • Tuning time (for 0 to 50% of the aimed Tuning time (for 0 to 50% of the aimed Shift (a.u.) vs time (ms) shift)= 1s 5

Packaging Packaging • FSR > 20 GHz • • 10 GHz < FSR< 20 Ghz 10 GHz < FSR< 20 Ghz • 2.5 GHz < FSR 6

Available options Available options • PM option PM ti • Variable attenuator » Minimum step available: 1.0 dB@-20 dB ER 0.5 dB@-10 dB ER » Readable precision: 2.0 dB@-20 dB ER 1.0 dB@-10 dB ER • Non balanced outputs for monitoring 7