976 nm Single-Polarization Single-Frequency Ytterbium-Doped Phosphate Fiber Amplifiers

Author

Xiushan Zhu ; Gongwen Zhu ; Wei Shi ; Jie Zong ; Wiersma, K. ; Nguyen, Donald ; Norwood, Robert A. ; Chavez-Pirson, A. ; Peyghambarian, N.

Author_Institution

NP Photonics, Tucson, AZ, USA

Volume

25

Issue

14

fYear

2013

fDate

15-Jul-13

Firstpage

1365

Lastpage

1368

Abstract

Core-pumped 976 nm single-polarization single-frequency fiber amplifiers based on several centimeter long polarization maintaining 6 wt% ytterbium (Yb³⁺) doped phosphate fibers are investigated experimentally and numerically. A 350 mW linearly polarized output with >20 dB polarization extinction ratio and >50 dB optical signal-to-noise ratio is obtained from a 4 cm fiber amplifier at maximum available pump power of 793 mW. The slope efficiency of the 4 cm fiber amplifier is 52.5%. A small signal net gain of 25 dB, corresponding to a unit gain of over 6 dB/cm is achieved in this fiber. It is predicted that a watt level 976 nm core-pumped fiber amplifier can be achieved using more powerful pumps and low insertion loss optical components.

Keywords

laser beams; numerical analysis; optical fibre amplifiers; optical fibre losses; optical fibre polarisation; optical noise; optical pumping; ytterbium; core-pumped single-polarization single-frequency ytterbium-doped phosphate fiber amplifiers; efficiency 52.5 percent; gain 25 dB; linearly polarized output; low insertion loss optical components; optical signal-to-noise ratio; polarization extinction ratio; polarization maintaining ytterbium-doped phosphate fiber; power 350 mW; power 793 mW; pump power; signal net gain; size 4 cm; slope efficiency; watt level core-pumped fiber amplifier; wavelength 976 nm; Fiber amplifier; phosphate fiber; single-polarization single-frequency laser; ytterbium-doped fiber amplifier;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2266113

Filename

6544603