{"title":"A Sub-Nanosecond Pulsed VCSEL Driver With PVT-Compensated Constant Current, Integrated Boost Switching Regulator and Class-1 Laser Eye Safety","authors":"Ming Zhong;Yifan Wu;Yuan Li;Wei Chen;Miao Sun;Liujia Song;Shanyu Cui;Xuefeng Chen;Patrick Yin Chiang;Shenglong Zhuo;Tao Xia","doi":"10.1109/JSSC.2025.3539432","DOIUrl":null,"url":null,"abstract":"This article presents a sub-nanoseconds pulsed laser diode (LD) driver IC for multi-junction (MJ-) vertical-cavity surface-emitting laser (VCSEL) arrays. An embedded real-time current control loop keeps the error of laser current amplitude within ±3% for 900 ps~32 ns pulses, even with process, voltage and temperature (PVT) variations of the VCSEL and the driver. With real-time PVT-compensation techniques, the variation of pulsewidth and propagation delay is below 140 ps for different chips under varying supply. A boost switching regulator is integrated into the IC to convert a low supply voltage into the <inline-formula> <tex-math>$5\\sim 8.5$ </tex-math></inline-formula>-V laser anode supply. A complete set of laser safety check blocks is integrated to guarantee class-1 eye safety, as the driver IC can stop emitting and cutoff the laser supply when a laser safety hazard is detected.","PeriodicalId":13129,"journal":{"name":"IEEE Journal of Solid-state Circuits","volume":"60 9","pages":"3379-3389"},"PeriodicalIF":5.6000,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Journal of Solid-state Circuits","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10910010/","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
This article presents a sub-nanoseconds pulsed laser diode (LD) driver IC for multi-junction (MJ-) vertical-cavity surface-emitting laser (VCSEL) arrays. An embedded real-time current control loop keeps the error of laser current amplitude within ±3% for 900 ps~32 ns pulses, even with process, voltage and temperature (PVT) variations of the VCSEL and the driver. With real-time PVT-compensation techniques, the variation of pulsewidth and propagation delay is below 140 ps for different chips under varying supply. A boost switching regulator is integrated into the IC to convert a low supply voltage into the $5\sim 8.5$ -V laser anode supply. A complete set of laser safety check blocks is integrated to guarantee class-1 eye safety, as the driver IC can stop emitting and cutoff the laser supply when a laser safety hazard is detected.
期刊介绍：
The IEEE Journal of Solid-State Circuits publishes papers each month in the broad area of solid-state circuits with particular emphasis on transistor-level design of integrated circuits. It also provides coverage of topics such as circuits modeling, technology, systems design, layout, and testing that relate directly to IC design. Integrated circuits and VLSI are of principal interest; material related to discrete circuit design is seldom published. Experimental verification is strongly encouraged.
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