Droplet-Based Optofluidic Switch as a Controllable Optical Pulse-Width Modulator

Mohammadreza Oraie, Hamid Latifi*, Hamed Qazvini, Hamed Nikbakht, Ayyub Ghaderzadeh

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

In this letter, we have experimentally realized a controllable optical pulse-width modulator (PWM) based on an optofluidic switch configuration. The modulating frequency and the duty cycle of this on-chip PWM can be tuned via changing the mass flow rate of the injected fluids into a right angle T-junction. The droplet generation and its relation to PWM parameters are studied experimentally and the functional parameters of the PWM are characterized through a mathematical model. The modulating frequency and the duty cycle of the proposed PWM can be controlled in the range of 7.1-43.7 Hz and 24.1%-70.5%, respectively. This type of PWM is convenient for integration as a complementary optical component into the microfluidic systems.

Original languageEnglish
Article number7967808
Pages (from-to)1383-1386
Number of pages4
JournalIEEE Photonics Technology Letters
Volume29
Issue number16
DOIs
Publication statusPublished - 15 Aug 2017
Externally publishedYes

Keywords

  • fluid dynamics
  • Microfluidics
  • optical modulation
  • optical switches
  • pulse width modulation

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