40Gb/s微带线电极聚合物电光调制器  

40 Gb/s Microstrip Line Polymer Electro-Optic Modulators

作　　者：白一鸣[1] 曲欣[2] 王晓林[2] 王士杰[2] 吴伯瑜[1] 

机构地区：[1]清华大学电子工程系,北京100084 [2]清华大学化工系高分子研究所,北京100084

出　　处：《激光与光电子学进展》2011年第12期92-97,共6页Laser & Optoelectronics Progress

基　　金：国家863计划(2007AA03Z409)资助课题

摘　　要：设计、制作和测试了用于1.31和1.55μm光波长的40Gb/s微带线行波电极的电光调制器。假设聚合物材料的电光系数γ33=30pm/V,设计的调制器性能参数分别是半波电压Vπ=4.92V和调制带宽42GHz。用有完全自主知识产权的二阶非线性光学聚合物材料BPAN-NT作为芯层材料制作了聚合物电光调制器。对调制器的各项特性参数进行了直流、低频和微波的测试,在1.31和1.55μm波长上测得低频(237 Hz)Vπ分别为32.1和40.5V,折算得芯层材料的电光系数γ33=3.856pm/V。测得消光比为20dB。在50MHz～40GHz频率范围内,测得电极系统实际的微波损耗系数α0=0.6dB.cm-1.GHz-1/2,用此值理论计算得出调制带宽为42.70GHz。在7.5～16.0GHz以及32～40GHz频率范围内用光谱仪测量器件的调制度M,并获得调制度的频率响应曲线。3dB调制带宽为30GHz。40 Gb/s polymer electro-optic modulators with microstrip line traveling-wave electrode are designed, fabricated and tested. Assuming that the electro-optic coefficient γ33 of the core polymer is 30 pm/V, the performance parameters of the designed modulator are half-wave voltage Vz = 4. 94 V and modulation bandwidth 42 GHz. The modulator is fabricated using the second-order nonlinear optical polymer material BPAN-NT with a completely independent intellectual property as the core layer material of the polymer electro-optic modulator. After that, the performances of the modulators in direct current （DC）, low frequencies and microwave regions are tested. The low-frequency （237 Hz） V, values at 1.31 and 1.55 μm wavelengths are 32.1 and 40.5 V, respectively. The electro-optic coefficient of core layer material 1,：~.~ is thus obtained as 3. 856 μm/V. The extinction ratio is measured to be 20 dB. Within the frequencies ranging from 50 MHz to 40 GHz, the actual measured microwave attenuation coefficient ao of the electrode system is 0.6 dB.cm^-1 .GHz^-1/2, Using this value, the modulation bandwidth of the modulator is calculated to be 42.70 GHz. The modulation indices are measured by using optical spectrum analyzer in the frequency range from 7.5 to 16 OHz and from 32 to 40 GHz. And the frequency response curve of the modulation index M of the electro-optic polymer modulator is also obtained. The 3 dB bandwidth of the 40 Gb/s modulator is 30 GHz.

关 键 词：光电子学 聚合物电光调制器 微带线 高速电光调制器 电晕极化 

分 类 号：TN252[电子电信—物理电子学]