CAJ | 학술논문

针对光电混合模数转换系统中采样光脉冲很窄,高速积分保持电路实现较困难这一问题,本文提出了一种新型的高速光保持模块.通过使用多个耦合器组成的无源结构,将采样后的超窄光脉冲转换成一族脉冲簇,再经过光电转换和电低通滤波,得到了顶部较平、脉宽较宽的脉冲,有助于降低后续处理电路的复杂度.实验结果表明,这种结构能够较好地实现将超窄脉冲展宽成平顶宽脉冲的功能.
침대광전혼합모수전환계통중채양광맥충흔착,고속적분보지전로실현교곤난저일문제,본문제출료일충신형적고속광보지모괴.통과사용다개우합기조성적무원결구,장채양후적초착광맥충전환성일족맥충족,재경과광전전환화전저통려파,득도료정부교평、맥관교관적맥충,유조우강저후속처리전로적복잡도.실험결과표명,저충결구능구교호지실현장초착맥충전관성평정관맥충적공능.
In an optoelectronic hybrid analog-to-digital conversion system, the duration of the optical sampling pulses was so short that high-speed " integrate-hold" electrical circuits were comparatively difficult to realize. In order to deal with this problem, a novel high-speed "Optical Hold Module" was proposed in this paper. By using a passive structure that consists of multiple optical couplers, the post-sampling ultra-short optical pulses were converted to pulse clusters, which were further converted to broader pulses with a relatively flat top after photo-electrical conversion and electrical low-pass filtering. This was helpful to reduce the complexity of the following electrical processing. The experiment shows that this structure was capable of converting the ultra-short pulses to broader pulses with flat top.