Coherent Perfect Absorption In A Weakly Absorbing Fiber

Keywords

erbium-doped fiber; Fabry-Pérot resonator; interference; Optical cavities

Abstract

Coherent perfect absorption refers to the interferometric enhancement of absorption in a partially lossy medium upto 100%. This can be achieved without modifying the absorbing medium itself, instead of engineering its photonic environment. Ion-doped fibers are one of the most technologically relevant absorbing materials in optics, which are widely employed in fiber amplifiers and lasers. Realizing complete optical absorption of an incident field in short-length moderately-doped fibers remains a challenge for the cost-effective design of compact fiber lasers. Here, we exploit the concept of coherent perfect absorption to overcome this challenge, whereby two appropriately designed fiber Bragg gratings define a short-length erbium-doped-fiber cavity that enforces complete absorption of an incident field on resonance - -independently of the doped-fiber intrinsic absorption. This approach applies to any spectral window and guarantees the efficient utilization of the fiber dopants along its length, thus, suggesting the possibility of next-generation efficient single-longitudinal-mode fiber lasers for applications in optical communication, sensing, and metrology.

Publication Date

8-1-2018

Publication Title

IEEE Photonics Journal

Volume

10

Issue

4

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/JPHOT.2018.2833073

Socpus ID

85048459987 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85048459987

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