Open AccessC-band waveguide amplifier produced by femtosecond laser writing
Author(s) -
Giuseppe Della Valle,
Roberto Osellame,
N. Chiodo,
S. Taccheo,
Giulio Cerullo,
P. Laporta,
Alexander Killi,
Uwe Morgner,
Max Lederer,
D. Kopf
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.005976
Subject(s) - materials science , optics , femtosecond , laser , amplifier , optical amplifier , waveguide , optoelectronics , erbium , diode , phosphate glass , ytterbium , net gain , doping , physics , cmos
An optical waveguide amplifier fabricated on erbium-ytterbium-doped phosphate glass by direct femtosecond laser writing is demonstrated. The waveguides are manufactured using 1040-nm radiation from a diode-pumped cavity-dumped Yb:KYW oscillator, operating at a 885 kHz repetition rate, with a 350 fs pulse duration. Peak internal gain of 9.2 dB is obtained at 1535 nm, with a minimum internal gain of 5.2 dB at 1565 nm. Relatively low insertion losses of 1.9 dB enable for the first time an appreciable net gain in the full C-band of optical communications.