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.
Tang
Hengsheng
H
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.
Li
Yigang
Y
Zhang
Yanwu
Y
Li
Yingfeng
Y
Li
Hao
H
Tu
Xin
X
Wu
Xiang
X
Liu
Liying
L
Xu
Lei
L
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