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C-band waveguide amplifier produced by femtosecond laser writing

C-band waveguide amplifier produced by femtosecond laser writing,10.1364/OPEX.13.005976,Optics Express,G. della Valle,R. Osellame,N. Chiodo,S. Taccheo

C-band waveguide amplifier produced by femtosecond laser writing   (Citations: 20)
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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.
Journal: Optics Express - OPT EXPRESS , vol. 13, no. 16, 2005
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