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Phase-only sampled 45 channel fiber Bragg grating written with a diffraction-compensated phase mask
Joshua E Rothenberg1, Hongpu Li, Yunlong Sheng
1Northrop Grumman Space Technology, Redondo Beach, California 90278, USA.
Optics Letters
|April 28, 2006
Summary
A new fiber Bragg grating with 45 channels was developed for precise dispersion matching. This advanced optical fiber component ensures high uniformity for telecommunication applications.
Area of Science:
- Photonics and Optical Engineering
- Telecommunications Technology
- Materials Science for Optical Devices
Background:
- Fiber Bragg gratings (FBGs) are crucial for wavelength-selective filtering in optical communication systems.
- Achieving high interchannel and intrachannel uniformity in multi-channel FBGs is challenging.
- Precise dispersion matching is essential for mitigating signal distortion in long-haul fiber optic links.
Purpose of the Study:
- To demonstrate a novel phase-only sampled 45-channel fiber Bragg grating.
- To achieve high reflection uniformity across all channels.
- To enable precise dispersion matching with standard 80 km SMF-28 fiber.
Main Methods:
- Fabrication using a side-writing technique.
- Incorporation of continuous phase-only sampling information.
- Utilization of a diffraction-compensated phase mask for precise phase encoding.
Main Results:
- Successful demonstration of a 45-channel fiber Bragg grating with 100 GHz channel spacing.
- High interchannel and intrachannel reflection uniformity achieved.
- Precise dispersion matching capability to 80 km SMF-28 fiber confirmed.
Conclusions:
- The novel phase-only sampled FBG offers superior performance for optical communication.
- The demonstrated grating meets stringent requirements for uniformity and dispersion control.
- The side-writing technique with a diffraction-compensated phase mask is effective for fabricating advanced FBGs.