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
SMART_READER_LITE
LIVE PREVIEW

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

Mar 24, 2023 1.37k likes •1.54k views

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

slide-1
SLIDE 1

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

slide-2
SLIDE 2

Table of contents Table of contents

O ti l l t

  • Optical layout
  • Phase tuning features
  • Packagings vs FSR
  • Some available options

Some available options

2

slide-3
SLIDE 3

Optical layout Optical layout

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

3

slide-4
SLIDE 4

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

i t t l t th instantaneously to the 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

Example of tuning speed of U-version

g µ ; 52 V » Tuning speed 0->100% 20µs

Example of tuning speed of U version 4

slide-5
SLIDE 5

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 20 V 5/256 = 20mV › Pour un shift de 180°=2V › Precision of 4°

» Power consumption

  • P(mW)=30.V^2.
  • Pmax=0.5W (V=4Volts)

» Speed

  • Tuning time (for 0 to 50% of the aimed

0.00E+00 2.00E+03 4.00E+03 6.00E+03 8.00E+03 1.00E+04 1.20E+04

Tuning time (for 0 to 50% of the aimed shift)= 1s

5

Shift (a.u.) vs time (ms)

slide-6
SLIDE 6

Packaging Packaging

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

6

slide-7
SLIDE 7

Available options Available options

PM ti

  • PM option
  • 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