Enhanced Extinction Ratio in QKD Transmitters Using On-Chip Saturable Absorbers

IF 2.4 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2026-02-06 DOI:10.1109/LPT.2026.3661870

Julian Konig;Ozan Çirkinoğlu;Rajib R. Ghosh;Martijn J. R. Heck;Xaveer J. M. Leijtens

引用次数: 0

Abstract

We demonstrate an integrated quantum key distribution (QKD) transmitter with enhanced extinction ratio (ER) using a monolithically integrated saturable absorber (SA). Since the light is later attenuated to the weak-coherent-state level, the additional signal loss in the SA does not impair performance. The SA improves the ER by 3.6 dB at 1 GHz, corresponding to an estimated ~50% relative reduction in quantum bit error rate and a ~17% increase in secret key rate, offering a compact, low-complexity route to improved secure key rates in practical QKD systems.

查看原文本刊更多论文

利用片上饱和吸收剂增强QKD发射机的消光比

我们展示了一个集成的量子密钥分发（QKD）发射机与增强消光比（ER）使用单片集成饱和吸收器（SA）。由于光后来衰减到弱相干态水平，因此SA中额外的信号损失不会损害性能。该SA在1ghz时将ER提高了3.6 dB，相当于量子比特误码率相对降低了约50%，密钥率提高了约17%，为提高实际QKD系统的安全密钥率提供了一种紧凑、低复杂度的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.