Theoretical analysis of a molecular optical modulator for a continuous-wave laser based on a hollow-core photonic crystal fiber

Shin ichi Zaitsu, Takumi Tanabe, Kota Oshima, Hiroyuki Hirata

Research output: Contribution to journalArticle

Abstract

A THz optical modulator for a continuous-wave laser using a hollow-core photonic crystal fiber (HC-PCF) was proposed and theoretically analyzed. Lightwaves traveling through the HC-PCF is modulated by interactions with coherently driven Raman-active molecules in the core. The coherent molecular motion is excited by a pulse train having an interval between successive pulses shorter than the molecular dephasing time. In principle, a rotational transition of molecular hydrogen (S0(1)) at a pressure of 1 atm has a long enough dephasing time to maintain molecular coherence during a 1 GHz commercially available mode-locked pulse train. Optimization of the waveguide dispersion would enable phase-matching between the probe beam and generated sidebands during optical modulation. The proposed scheme would be achievable with a reasonable pump beam power and HC-PCF length, and with a feasible pressure of molecules in the core.

Original languageEnglish
Article number1895
JournalApplied Sciences (Switzerland)
Volume8
Issue number10
DOIs
Publication statusPublished - Oct 12 2018

Fingerprint

Continuous wave lasers
Photonic crystal fibers
Light modulators
continuous wave lasers
modulators
hollow
photonics
fibers
crystals
Phase matching
Molecules
Light modulation
Laser modes
pulses
Hydrogen
Laser pulses
Waveguides
Pumps
light modulation
phase matching

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes

Cite this

Theoretical analysis of a molecular optical modulator for a continuous-wave laser based on a hollow-core photonic crystal fiber. / Zaitsu, Shin ichi; Tanabe, Takumi; Oshima, Kota; Hirata, Hiroyuki.

In: Applied Sciences (Switzerland), Vol. 8, No. 10, 1895, 12.10.2018.

Research output: Contribution to journalArticle

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