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R. Yamamoto and N. B. Miyadera, “Optical Waveguide Structure Including at least First, Second and Third Waveguides and Coupling Waveguide,” United States, US007664353B2, Feb 2010.

has been cited by the following article:

• TITLE: Design of Thermo-Optic Variable Optical Attenuator Based on Quartz Substrate

  AUTHORS: Hongqing Dai, Junming An, Liangliang Wang, Yue Wang, Liyao Zhang, Jiashun Zhang, Hongjie Wang, Pan Pan, Xiaoguang Zhang, Ruidan Liu, Jianguang Li, Yuanda Wu, Xiongwei Hu

  KEYWORDS: VOA; MZI; Thermo-optic; Quartz Substrate

  JOURNAL NAME: Optics and Photonics Journal, Vol.3 No.2B, July 19, 2013

  ABSTRACT: In this paper, we designed a thermo-optic variable optical attenuator (VOA) based on quartz substrate, which consists of a Mach-Zehnder interferometer (MZI) and a thin film heater above the phase-modulation arm. The transmission properties of the waveguide and attenuation characteristics of the device have been simulated by beam propagation method (BPM), and the simulated results illustrated that the designed VOA had good performance.