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All-fiber passive alignment-free depolarizers capable of depolarizing narrow linewidth signals

All-fiber passive alignment-free depolarizers capable of depolarizing narrow linewidth signals
All-fiber passive alignment-free depolarizers capable of depolarizing narrow linewidth signals

We report on two fully-fiberized, input polarization independent depolarizer configurations that do not need any alignment once fabricated. This makes them suitable for real-world applications. The first configuration uses polarization-maintaining (PM) fibers and relatively few components. The second configuration uses standard (non-PM) single mode fibers (SMFs) to introduce the large time delays needed to enable narrow-linewidth signal depolarization, albeit at the cost of a slightly increased component count and insertion loss. We theoretically analyze the depolarization performance of the proposed configurations as a function of various depolarizer parameters.

Subsequently, we design the depolarizers considering the imperfections of standard commercially available components. Finally, we fabricate prototypes of both configurations, characterize their depolarization performance using sources of variable linewidth, and compare the experimental results with theoretical analysis. The fabricated depolarizers are shown to be capable of the depolarization of 20 MHz and 1 MHz linewidth signals with residual degree of polarization (DOP) below 4%.

Delays, Optical fiber amplifiers, Optical fiber couplers, Optical fiber devices, Optical fiber polarization, Optical fiber sensors, Optical polarization
0733-8724
704-714
Mutugala, Udara Sandamal
36ff42da-023b-44ef-8593-fcddbdca8cdb
Giles, Ian
62b1db12-1f36-415a-bac4-d0ef1fb8d2e3
Ding, Meng
45fbd64c-522d-45ff-a918-013404105cdb
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Mutugala, Udara Sandamal
36ff42da-023b-44ef-8593-fcddbdca8cdb
Giles, Ian
62b1db12-1f36-415a-bac4-d0ef1fb8d2e3
Ding, Meng
45fbd64c-522d-45ff-a918-013404105cdb
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d

Mutugala, Udara Sandamal, Giles, Ian, Ding, Meng, Richardson, David J. and Slavík, Radan (2019) All-fiber passive alignment-free depolarizers capable of depolarizing narrow linewidth signals. IEEE Journal of Lightwave Technology, 37 (3), 704-714. (doi:10.1109/JLT.2018.2870964).

Record type: Article

Abstract

We report on two fully-fiberized, input polarization independent depolarizer configurations that do not need any alignment once fabricated. This makes them suitable for real-world applications. The first configuration uses polarization-maintaining (PM) fibers and relatively few components. The second configuration uses standard (non-PM) single mode fibers (SMFs) to introduce the large time delays needed to enable narrow-linewidth signal depolarization, albeit at the cost of a slightly increased component count and insertion loss. We theoretically analyze the depolarization performance of the proposed configurations as a function of various depolarizer parameters.

Subsequently, we design the depolarizers considering the imperfections of standard commercially available components. Finally, we fabricate prototypes of both configurations, characterize their depolarization performance using sources of variable linewidth, and compare the experimental results with theoretical analysis. The fabricated depolarizers are shown to be capable of the depolarization of 20 MHz and 1 MHz linewidth signals with residual degree of polarization (DOP) below 4%.

Full text not available from this repository.

More information

Accepted/In Press date: 7 September 2018
e-pub ahead of print date: 24 September 2018
Published date: 1 February 2019
Keywords: Delays, Optical fiber amplifiers, Optical fiber couplers, Optical fiber devices, Optical fiber polarization, Optical fiber sensors, Optical polarization

Identifiers

Local EPrints ID: 427087
URI: https://eprints.soton.ac.uk/id/eprint/427087
ISSN: 0733-8724
PURE UUID: f38d4719-4524-4232-b810-67615f2f75d4
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Radan Slavík: ORCID iD orcid.org/0000-0002-9336-4262

Catalogue record

Date deposited: 21 Dec 2018 16:31
Last modified: 01 Aug 2019 00:38

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