Polarization-dependent characteristics of a racetrack waveguide resonator fabricated by ion exchange

• 作 者: 韩秀友 刘峰 庞拂飞 初凤红 蔡海文 瞿荣辉 方祖捷
• 机 构: Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences,Shanghai Institute of O
• 出 处: Chinese Optics Letters
• 发表日期: 2006年07期
• 关键词: resonator waveguide Polarization tunable polarized transverse straight indices W

A racetrack waveguide resonator filter was fabricated by ion exchange technology in K9 optical glass. The filter responses of the waveguide resonator were measured with two polarized input lightwaves. The polarization-dependent characteristics of the waveguide resonator were analyzed, and the results of effective indices of nTE = 1.5721 and nTM = 1.5548, coupling ratios of rTE = 0.731 and rTM = 0.761, and losses ofαTE = 4.35 dB/cm andαTM = 6.05 dB/cm were obtained for transverse electric (TE) and transverse magnetic (TM) modes, respectively. The causes of large loss and effective index differences between TE and TM modes were discussed.

A racetrack waveguide resonator filter was fabricated by ion exchange technology in K9 optical glass. The filter responses of the waveguide resonator were measured with two polarized input light waves. The polarization-dependent characteristics of the waveguide resonator were analyzed, and the results of effective indices of and TE = 4.35 dB / cm and αTM = 6.05 dB / cm were obtained for transverse electric (TE) and transverse magnetic (TM) modes, respectively, with nTE = 1.5721 and nTM = 1.5548, respectively, The causes of large loss and effective index differences between TE and TM modes were discussed.