Novel Er and Ce codoped fluoride fiber amplifier for low-noise and high-efficient operation with 980-nm pumping

Author

Kubota, Yoshinori ; Teshima, Takuya ; Nishimura, Natuya ; Kanto, Sadao ; Sakaguchi, Shigeki ; Meng, Zhicong ; Nakata, Yoshiki ; Okada, Tatsuo

Author_Institution

Opt. Device Dev. Dept., Central Glass Co. Ltd., Yamaguchi, Japan

Volume

15

Issue

4

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

525

Lastpage

527

Abstract

We demonstrate the low-noise and high-gain operation of a fluoride Er/sup 3+/ and Ce/sup 3+/ codoped fiber (F-ECDF) amplifier with 980-nm pumping. A 980-nm-pumped F-ECDF with a length of only 45 cm exhibits a noise figure of <4.5 dB in the entire C-band and a small signal gain of >20 dB with a gain ripple of <1 dB without any gain-flattening filter in the 1525-1560-nm range. Excitation spectra for the gain and noise figure of an F-ECDF exhibit flat shapes in the 974-982-nm range. We also demonstrate that the gain coefficient reaches 1.4 dB/mW and the power conversion efficiency is 27.4% at 1532 nm for a 2.25-m-long F-ECDF.

Keywords

cerium; erbium; infrared spectra; laser noise; optical fibre amplifiers; optical pumping; 1525 to 1560 nm; 1532 nm; 2.25 m; 27.4 percent; 45 cm; 974 to 982 nm; 980 nm; 980-nm pumping; C-band; Er,Ce codoped fluoride fiber amplifier; excitation spectra; flat shapes; gain coefficient; highly-efficient operation; low-noise; noise figure; power conversion efficiency; small signal gain; Cerium; Erbium; Gain; Glass; Low-noise amplifiers; Noise figure; Noise measurement; Operational amplifiers; Optical fiber devices; Silicon compounds;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.809302

Filename

1190191