A semi-weakly confined erbium-doped waveguide amplifier with double-layered buffer/cladding.
A semi-weakly confined waveguide structure was designed and fabricated. This waveguide structure has a 350 nm thin core layer. Its optical mode field is weakly confined in vertical direction but is strongly confined laterally. The waveguide can support a nearly circular optical field distribution that matches well with a single-mode fiber. An erbium-doped waveguide amplifier (EDWA) with the new waveguide structure was fabricated by sol-gel method. The EDWA has a passive core and double-layered buffer/cladding. A small coupling loss of 0.4 dB/facet and an internal gain of 1.9 dB via evanescent wave amplification near 1550 nm were obtained.
The State Key Lab for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, School of Information Science and Engineering, Fudan University, Shanghai 200433, China.
Hengsheng
H
Tang
Yigang
Y
Li
Yanwu
Y
Zhang
Yingfeng
Y
Li
Hao
H
Li
Xin
X
Tu
Xiang
X
Wu
Liying
L
Liu
Lei
L
Xu
D000669:Amplifiers, Electronic; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D008027:Light; D008904:Miniaturization; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D012542:Scattering, Radiation