单片集成25 Gb/s电吸收调制器的O波段可调谐V型腔激光器  

O-Band Tunable V-Cavity Laser Monolithically Integrated with 25 Gb/s Electro-Absorption Modulator

作　　者：夏诒民 孟剑俊 李乔力 何建军[1,2] Xia Yimin;Meng Jianjun;Li Qiaoli;He Jianjun(State Key Laboratory of Modern Optical Instrumentation,College of Optical Science and Engineering,Zhejiang University,Hangzhou 310012,Zhejiang,China;Lightip Technologies Co.,Ltd.,Hangzhou 310058,Zhejiang,China)

机构地区：[1]浙江大学光电科学与工程学院现代光学仪器国家重点实验室,浙江杭州310012 [2]杭州兰特普光电子技术有限公司,浙江杭州310058

出　　处：《光学学报》2024年第11期144-149,共6页Acta Optica Sinica

基　　金：国家自然科学基金(62027825,61960206001)。

摘　　要：本文实现了O波段可调谐的25 Gb/s电吸收调制激光器(EML)光发射器芯片和封装器件,该EML芯片单片集成了大范围可调谐V型腔激光器和电吸收调制器,并采用了相同的外延层方案。在O波段,该器件实现了20个信道、100 GHz间隔的波长调谐,边模抑制比超过37 dB。当驱动电压峰峰值固定为2 V时,所有信道在25 Gb/s的速率下显示出清晰的眼图,动态消光比均超过5 dB。误码率测量表明,当通过25 km的标准单模光纤传输后,器件的所有信道都没有色散代价。Objective The high-speed tunable optical transmitter is a key component of the wavelength division multiplexing(WDM)system.Due to its compactness,high modulation efficiency,and low power consumption,the electro-absorption modulator(EAM)based on the quantum-confined Stark effect is a preferred choice for high-speed transmitters.Since standard single-mode fibers(SMFs)feature zero dispersion at wavelengths close to 1.3μm,O-band electro-absorption modulated lasers(EMLs)are more competitive than C-band EMLs for short-distance applications due to the absence of dispersion penalties.However,an O-band tunable laser integrated with an EAM has not been reported before.EMLs are generally considered costly due to the critical regrowth process required by the commonly adopted butt-joint integration scheme.Meanwhile,common tunable lasers are mainly based on complex grating structures.Such a structure requires high-resolution lithography and epitaxial regrowth,making the EMLs even more expensive.Therefore,costs have become an important obstacle to their deployment in cost-sensitive applications such as 5G and access networks.To overcome such shortcomings,we present a regrowth-free electro-absorption modulated widely tunable V-cavity laser(VCL)using an identical epitaxial layer(IEL)integration scheme.Similar to that of Fabry-Perot(FP)lasers,the fabrication process of this laser requires no grating or epitaxial regrowth.The IEL integration scheme,which employs the same multiple quantum well(MQW)structure for both the laser and EAM sections,can be used to simplify device fabrication significantly.Moreover,to achieve a larger modulation bandwidth without increasing the complexity of the process,we optimized the electrode design of the EAM to reduce the parasitic capacitance.In this paper,we report a widely tunable 25 Gb/s transmitter that integrates a VCL and an EAM in the O-band and demonstrate its dispersion-penalty-free transmission over 25 km standard SMFs.Methods The device consists of a VCL and an EAM,which are connected via

关 键 词：激光器 电吸收调制器 可调谐激光器 单片集成 

分 类 号：O436[机械工程—光学工程]