Browsing by Author "Tseng, Shiao-Min"

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CW-pumped evanescent amplification based on side-polished fiber with heavily Er3+-doped glass overlay
(2006-08-01)
Chen, Nan-Kuang
;
Zhang, Liyan
;
Hsu, Kuei-Chu
;
Hu, Lili
;
Chi, Sien
A novel diffractive-pumping scheme is proposed to improve the evanescent amplification using blazed fiber grating for the first time. We also investigate the cw-pumped-evanescent amplification at 1.55 mu m wavelength with the relative optical gain pumped at 1480 nm of around 2 dB based on side-polished fiber with the effective interaction length as long as 16 mm and with a heavily Er3+-doped (N-Er(3+) > 1.19 x 10(21) ions/cm(3)), low refractive index (n(1550) < 1.47) glass overlay, which has no concentration quenching (tau(f) = 9.0 ms).
Evanescent-field optical amplifiers and lasers
(2006-06-29)
Chen, Nan-Kuang
;
Chi, Sien
;
Tseng, Shiao-Min
;
Lai, Yinchieh
An optical amplifier and a laser generator based on the fiber side-polished technology, having a high pumping efficiency, a low noise figure and a small footprint are provided in this application. The optical amplifier and the laser, which have a very long effective interaction length in conjunction with highly doped Erbium glass attached to its surface and an addition of a slanted fiber grating inscribed in the guiding core at the polished region can spatially separate the signal and pump power to simultaneously improve the pumping efficiency and optimize the penetrated depth of the signal evanescent-field. The spontaneous emission is kept from being amplified and therefore a high quality amplified signal is produced.