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Narrowband and tunable optical parametric amplification in Bismuth-Oxide-based highly nonlinear fiber
1Department of Electronic Engineering, Institute of Industrial Science, The University of Tokyo, Japan. kyota@iis.u-tokyo.ac.jp
Optics Express
|September 6, 2008
Summary
This study demonstrates narrowband optical amplification using bismuth-oxide highly nonlinear fiber. Researchers achieved tunable gain peaks and narrow bandwidths, advancing fiber optic technologies.
Area of Science:
- Photonics
- Nonlinear Optics
- Optical Fiber Communications
Background:
- One-pump fiber optical parametric amplification (FOPA) typically requires small group-delay dispersion for wideband amplification.
- Bismuth-Oxide-based highly nonlinear fibers (Bi-HNLFs) offer unique dispersion properties not previously explored for FOPA.
Purpose of the Study:
- To investigate one-pump FOPA in short Bi-HNLF with large normal dispersion at 1550nm.
- To characterize the FOPA performance, including bandwidth and gain characteristics, in this novel fiber.
Main Methods:
- Theoretical modeling of FOPA in Bi-HNLF with significant normal dispersion (beta(2)) and higher-order dispersion (beta(4)).
- Experimental setup utilizing a 2m-long Bi-HNLF for one-pump FOPA demonstration.
- Measurement of gain bandwidth and gain peak.
Main Results:
- FOPA in Bi-HNLF exhibits narrowband characteristics due to large beta(2) and beta(4).
- The gain peak wavelength is tunable and directly proportional to the pump wavelength.
- Experimental results show a gain bandwidth as narrow as 0.75nm and a high gain peak of 58dB.
Conclusions:
- One-pump FOPA in short Bi-HNLF with large normal dispersion leads to narrowband amplification.
- The tunability of the gain peak offers potential for specific wavelength applications.
- This research presents a novel approach to controlling FOPA bandwidth using specialized nonlinear fibers.
