Tunable gain-flattening filter using long-period fiber grating based on periodic core deformation

Ik-bu Sohn; Jeonghoon Kim; Namkwon Lee; Hyungwoo Kwon; Jaewon Song

doi:10.1117/12.446536

29 October 2001 Tunable gain-flattening filter using long-period fiber grating based on periodic core deformation

Ik-bu Sohn, Jeonghoon Kim, Namkwon Lee, Hyungwoo Kwon, Jaewon Song

Proceedings Volume 4594, Design, Fabrication, and Characterization of Photonic Devices II; (2001) https://doi.org/10.1117/12.446536
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore

Abstract

A new type of gain-flattening filter using long-period fiber gratings (LPFGs) based on periodic microbends is presented. The fabrication and characterization of the device are described and its use in an erbium-doped fiber amplifier (EDFA) to flatten the ASE spectrum is demonstrated. This filter, which is simple and inexpensive, exhibits the unique advantages of being tunable, erasable, and reconfigurable. The result shows that the gain variation over the wavelength range 1525 to 1560nm is less then 1dB when pumped with 45mW and 40mW of pump power at 980nm from a laser diode.

Citation Download Citation

Ik-bu Sohn, Jeonghoon Kim, Namkwon Lee, Hyungwoo Kwon, and Jaewon Song "Tunable gain-flattening filter using long-period fiber grating based on periodic core deformation", Proc. SPIE 4594, Design, Fabrication, and Characterization of Photonic Devices II, (29 October 2001); https://doi.org/10.1117/12.446536

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