Experimental characterization of an off-axis scheme for pumping high-power photonic crystal fiber lasers

Boris Rosenstein; Avry Shirakov; Daniel Belker; Amiel A. Ishaaya

doi:https://doi.org/10.1007/s00340-014-5767-4

Experimental characterization of an off-axis scheme for pumping high-power photonic crystal fiber lasers

Boris Rosenstein, Avry Shirakov, Daniel Belker, Amiel A. Ishaaya

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

Abstract

We experimentally investigate a free-space, off-axis method for pumping high-power photonic crystal fiber (PCF) lasers and amplifiers. The method is based on off-axis injection of the pump beam, exploiting the relatively high numerical aperture of the PCF pump cladding. With this method, we obtain pump coupling efficiency of more than 97 % for incidence angles as high as 30 degrees and show that with more than 60-W pump power the laser efficiency and beam quality do not significantly depend on the incidence angle. Our results indicate that this off-axis pumping method, with its significant advantages over the standard on-axis methods, can be exploited in high-power photonic crystal lasers and amplifiers.

Original language	American English
Pages (from-to)	327-331
Number of pages	5
Journal	Applied Physics B: Lasers and Optics
Volume	114
Issue number	3
DOIs	https://doi.org/10.1007/s00340-014-5767-4
State	Published - 1 Mar 2014

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physics and Astronomy (miscellaneous)

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title = "Experimental characterization of an off-axis scheme for pumping high-power photonic crystal fiber lasers",

abstract = "We experimentally investigate a free-space, off-axis method for pumping high-power photonic crystal fiber (PCF) lasers and amplifiers. The method is based on off-axis injection of the pump beam, exploiting the relatively high numerical aperture of the PCF pump cladding. With this method, we obtain pump coupling efficiency of more than 97 % for incidence angles as high as 30 degrees and show that with more than 60-W pump power the laser efficiency and beam quality do not significantly depend on the incidence angle. Our results indicate that this off-axis pumping method, with its significant advantages over the standard on-axis methods, can be exploited in high-power photonic crystal lasers and amplifiers.",

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AU - Rosenstein, Boris

AU - Shirakov, Avry

AU - Belker, Daniel

AU - Ishaaya, Amiel A.

PY - 2014/3/1

Y1 - 2014/3/1

N2 - We experimentally investigate a free-space, off-axis method for pumping high-power photonic crystal fiber (PCF) lasers and amplifiers. The method is based on off-axis injection of the pump beam, exploiting the relatively high numerical aperture of the PCF pump cladding. With this method, we obtain pump coupling efficiency of more than 97 % for incidence angles as high as 30 degrees and show that with more than 60-W pump power the laser efficiency and beam quality do not significantly depend on the incidence angle. Our results indicate that this off-axis pumping method, with its significant advantages over the standard on-axis methods, can be exploited in high-power photonic crystal lasers and amplifiers.

AB - We experimentally investigate a free-space, off-axis method for pumping high-power photonic crystal fiber (PCF) lasers and amplifiers. The method is based on off-axis injection of the pump beam, exploiting the relatively high numerical aperture of the PCF pump cladding. With this method, we obtain pump coupling efficiency of more than 97 % for incidence angles as high as 30 degrees and show that with more than 60-W pump power the laser efficiency and beam quality do not significantly depend on the incidence angle. Our results indicate that this off-axis pumping method, with its significant advantages over the standard on-axis methods, can be exploited in high-power photonic crystal lasers and amplifiers.

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JO - Applied Physics B: Lasers and Optics

JF - Applied Physics B: Lasers and Optics

IS - 3

ER -

Experimental characterization of an off-axis scheme for pumping high-power photonic crystal fiber lasers

Abstract

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