中国物理B ›› 2004, Vol. 13 ›› Issue (7): 1046-1051.doi: 10.1088/1009-1963/13/7/014

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An all-optical switch of Mach－Zehnder interferometer type using an active fibre ring resonator

李俊庆1, Alireza Bananej1, 陈强1, 李淳飞1, 励强华2   

  1. (1)Department of Physics, Harbin Institute of Technology, Harbin 150001, China; (2)Department of Physics, Harbin Institute of Technology, Harbin 150001, China; Department of Physics, Harbin Normal University, Harbin 150080, China
  • 收稿日期:2003-08-27 修回日期:2003-11-06 出版日期:2004-07-05 发布日期:2005-07-05
  • 基金资助:
    Project supported by the Scientific Research Foundation of Harbin Institute of Technology (Grant No HIT200250).

An all-optical switch of Mach－Zehnder interferometer type using an active fibre ring resonator

Li Jun-Qing (李俊庆)a, Alireza Bananeja, Li Qiang-Hua (励强华)ab, Chen Qiang (陈强)a, Li Chun-Fei (李淳飞)a   

  1. a Department of Physics, Harbin Institute of Technology, Harbin 150001, China; b Department of Physics, Harbin Normal University, Harbin 150080, China
  • Received:2003-08-27 Revised:2003-11-06 Online:2004-07-05 Published:2005-07-05
  • Supported by:
    Project supported by the Scientific Research Foundation of Harbin Institute of Technology (Grant No HIT200250).

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摘要： We propose an all-optical switch of the Mach－Zehnder interferometer type using an active nonlinear ring resonator and analyse the significance of the parameter A, a product of gain and total loss, for performing an ideal 1 by 2 switch. We found that in the range of 1-κ≤A≤\sqrt{1-κ}, the increment of A can compensate the losses inside the ring, therefore increase the finesse of the ring and enhance the nonlinearity contribution to reduce the switching power threshold effectively. We also emphasize the importance of the initial switching point and discuss the feasibility of utilizing a high-nonlinear fibre in the ring.

关键词: optical switching, fibre-optical devices, interferometer

Abstract: We propose an all-optical switch of the Mach－Zehnder interferometer type using an active nonlinear ring resonator and analyse the significance of the parameter A, a product of gain and total loss, for performing an ideal 1 by 2 switch. We found that in the range of $1-\kappa\leq A\leq \sqrt{1-\kappa}$, the increment of A can compensate the losses inside the ring, therefore increase the finesse of the ring and enhance the nonlinearity contribution to reduce the switching power threshold effectively. We also emphasize the importance of the initial switching point and discuss the feasibility of utilizing a high-nonlinear fibre in the ring.

Key words: optical switching, fibre-optical devices, interferometer

中图分类号:  (Optical bistability, multistability, and switching, including local field effects)

  • 42.65.Pc
42.79.Sz (Optical communication systems, multiplexers, and demultiplexers?) 07.60.Ly (Interferometers) 42.81.Wg (Other fiber-optical devices) 42.81.Dp (Propagation, scattering, and losses; solitons)