Complex lasing based decentralized key distribution controlled by photothermal effect

Zhu, Hong; Zhang, Jin Chuan; Zhang, Wei Li

doi:10.1364/ofc.2022.th4b.1

Cited by 1 publication

(1 citation statement)

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“…The sample can be made into an open microfluid channel with circulating and replaceable gain solution to avoid photobleaching. Figure c shows the output power of the lasers when repeatedly setting it to the “0” and “1” states by the photothermal effect, and the cycle time between “dark” and “bright” states was set to 0.5 min to ensure the LC relaxing to a relatively stable state in each round trip. , The output power corresponding to the two logical states changes slightly under 20 cycles of upward and downward scans of P NIR , indicating that the logical operation is quite stable. In Figure d, the output powers of the laser were set to different logical states and monitored every 5 min, and both the “0” and “1” states can keep stable in a relatively long time period.…”

Section: Resultsmentioning

confidence: 99%

Photothermal Effect Controlled Complex Lasing for Decentralized Key Distribution

Zhu

Zhang

2022

ACS Photonics

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Laser emission in complex structures actively generates unclonable randomness in multidimensional domains, which has great potential for information security. Especially, developing security protocols with extended functions is urgently demanded by the Internet of Things and blockchain applications. Here, a fiber-type microcavity complex laser is developed with a random output spectrum and a bistable output intensity, wherein the dye-doped liquid crystal is used as the gain and hystereticmemory medium. The laser emits multiple spikes that vary randomly pulse-by-pulse in a relatively wide spectral band, and the logical/bistable "0" and "1" states of emission can be controlled by the photothermal effect. The lasers are proposed to act as active encryption units of end nodes in a network, wherein the spectra randomness is used to form random bit strings and the logical states are used to define the classification. Taking advantage of this hybrid advantage of complex lasing, a decentralized key distribution method is proposed with the function of key self-generation and self-direction at individual end nodes. This work would pave the way for information security in the decentralized network of multiscenario applications.

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Section: Resultsmentioning

confidence: 99%

Photothermal Effect Controlled Complex Lasing for Decentralized Key Distribution

Zhu

Zhang

2022

ACS Photonics

Self Cite

View full text Add to dashboard Cite

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Complex lasing based decentralized key distribution controlled by photothermal effect

Abstract: A logical-state fiber microcavity laser is proposed with random output spectrum controlled by photothermal effect. Combining the random and bistable features, decentralized key distribution is developed with functions of key generation/encryption at individual end-nodes.

Cited by 1 publication

References 6 publications

Photothermal Effect Controlled Complex Lasing for Decentralized Key Distribution

Photothermal Effect Controlled Complex Lasing for Decentralized Key Distribution

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