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Tunable dispersion compensation by a rotating cylindrical lens.
Michael E Durst1, Demirhan Kobat, Chris Xu
1School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA. med43@cornell.edu
Optics Letters
|April 17, 2009
Summary
We developed a low-cost, high-speed tunable dispersion compensation technique. This method effectively compensates for optical fiber dispersion using a rotating lens in a 4f system.
Area of Science:
- Optics and Photonics
- Telecommunications
Background:
- Optical fiber communication systems are susceptible to chromatic dispersion.
- Existing dispersion compensation techniques can be costly or have limited tuning ranges.
Purpose of the Study:
- To present a novel, cost-effective, and high-speed technique for tunable dispersion compensation.
- To demonstrate a large tuning range for group-velocity dispersion compensation.
Main Methods:
- Implemented a folded 4f grating pair system.
- Utilized a cylindrical lens rotated at the Fourier plane for dispersion tuning.
Main Results:
- Achieved tunable group-velocity dispersion over a range exceeding 10^5 fs^2.
- Demonstrated sufficient compensation for several meters of optical fiber.
Conclusions:
- The proposed technique offers a practical solution for dispersion management in optical systems.
- This method provides a large, tunable dispersion compensation range at low cost and high speed.
