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Multi trench fiber: an industrial solution for high power fiber laser manufacturing

Multi trench fiber: an industrial solution for high power fiber laser manufacturing
Multi trench fiber: an industrial solution for high power fiber laser manufacturing
Fiber lasers have become a tool of choice for industrial manufacturing. They find numerous applications in diverse fields such as medical, material processing, defence, oil and gas, aerospace, metrology, astrophysics, and space communications etc thanks to their outstanding features such as good beam quality, thermal management, and flexibility. However, non-linear effects have always been an obstacle for power scaling of fiber lasers. Several fiber designs such as Photonic Crystal Fibers (PCFs), 2D-All solid Photonic Bandgap Fiber (2D-ASPBGFs) etc, have been demonstrated to overcome these limitations by offering effective single mode operation and large effective area of the fundamental mode. However, such fibers are relatively expensive to manufacture as they require stack-and-draw technique to fabricate them.
We recently proposed a novel fiber design known as Multi Trench Fiber (MTF) shown in Fig. 1(a) and 1(b) [1-2]. The fiber can offer effective area larger than 10,000µm2 in rod type configuration and 800µm2 in flexible configuration. Figure 1(a) and 1(b) shows the refractive index profile and cross sectional image of 30µm and 90µm core diameter fabricated fibers respectively. The fibers are fabricated using conventional Modified Chemical Vapour Deposition (MCVD) process in conjunction with rod-in-tube technique, hence suitable for mass scale production. Figure 1(c) and 1(d) shows the transmission spectrum and output beam profile, which ensures an effective single mode operation. The MTF geometry, being an all solid structure, offers other additive advantages of easy splicing and cleaving. A low-cost monolithic fiber laser device with can be developed using MTF thanks to their high suppression of the HOMs, conventional fabrication process suitable for industrial manufacturing, and all solid structure for easy splicing and cleaving.
Jain, D.
787e5045-8862-46ba-b15e-82c2fe60495f
Jung, Y.
6685e51e-be47-4c96-8c4b-65aee3b5126d
Sahu, J.K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Jain, D.
787e5045-8862-46ba-b15e-82c2fe60495f
Jung, Y.
6685e51e-be47-4c96-8c4b-65aee3b5126d
Sahu, J.K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2

Jain, D., Jung, Y. and Sahu, J.K. (2014) Multi trench fiber: an industrial solution for high power fiber laser manufacturing. 3rd EPSRC Conference: manufacturing the future, Glasgow, United Kingdom. 22 - 23 Sep 2014.

Record type: Conference or Workshop Item (Paper)

Abstract

Fiber lasers have become a tool of choice for industrial manufacturing. They find numerous applications in diverse fields such as medical, material processing, defence, oil and gas, aerospace, metrology, astrophysics, and space communications etc thanks to their outstanding features such as good beam quality, thermal management, and flexibility. However, non-linear effects have always been an obstacle for power scaling of fiber lasers. Several fiber designs such as Photonic Crystal Fibers (PCFs), 2D-All solid Photonic Bandgap Fiber (2D-ASPBGFs) etc, have been demonstrated to overcome these limitations by offering effective single mode operation and large effective area of the fundamental mode. However, such fibers are relatively expensive to manufacture as they require stack-and-draw technique to fabricate them.
We recently proposed a novel fiber design known as Multi Trench Fiber (MTF) shown in Fig. 1(a) and 1(b) [1-2]. The fiber can offer effective area larger than 10,000µm2 in rod type configuration and 800µm2 in flexible configuration. Figure 1(a) and 1(b) shows the refractive index profile and cross sectional image of 30µm and 90µm core diameter fabricated fibers respectively. The fibers are fabricated using conventional Modified Chemical Vapour Deposition (MCVD) process in conjunction with rod-in-tube technique, hence suitable for mass scale production. Figure 1(c) and 1(d) shows the transmission spectrum and output beam profile, which ensures an effective single mode operation. The MTF geometry, being an all solid structure, offers other additive advantages of easy splicing and cleaving. A low-cost monolithic fiber laser device with can be developed using MTF thanks to their high suppression of the HOMs, conventional fabrication process suitable for industrial manufacturing, and all solid structure for easy splicing and cleaving.

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More information

e-pub ahead of print date: September 2014
Venue - Dates: 3rd EPSRC Conference: manufacturing the future, Glasgow, United Kingdom, 2014-09-22 - 2014-09-23
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 369662
URI: http://eprints.soton.ac.uk/id/eprint/369662
PURE UUID: 161c4771-e6ad-4f91-8ae5-20e1cd2b636e
ORCID for Y. Jung: ORCID iD orcid.org/0000-0002-9054-4372
ORCID for J.K. Sahu: ORCID iD orcid.org/0000-0003-3560-6152

Catalogue record

Date deposited: 14 Oct 2014 10:42
Last modified: 12 Dec 2021 03:42

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Contributors

Author: D. Jain
Author: Y. Jung ORCID iD
Author: J.K. Sahu ORCID iD

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