Timing and clock management for photon counting applications

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00317953" target="_blank" >RIV/68407700:21340/17:00317953 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Timing and clock management for photon counting applications

Original language description

The work presents the design and construction of modules for precise timing for use in single-photon applications. The modules were tested in several experiments verifying their performance. A frequency multiplier and time-todigital converter are part of a multipurpose single-photon lidar demonstrator aiming at space-borne applications. The demonstrator is formed by receiving and transmitting optics, microchip laser, single-photon avalanche detector, and time-to-digital converter. The frequency multiplier feeds the demonstrator with low-noise system frequency. Designs of both the frequency multiplier and the time-to-digital converter have been developed keeping in mind their easy conversion to radiation hardened versions. The time-to-digital converter is based on FPGA with existing radiation hardened equivalent. The converter employs a passive delay line sampled in regular intervals allowing to achieve better time resolution than in a topology with delay line based solely on active elements. The single-photon detector is based on radiation hard K14 diode operated in active quenching mode. Main foreseen application of the lidar is an altimeter for planet or asteroid probes. Repetition rate of such a lidar raw measurements is constrained by the laser repetition rate and is of 4 kHz, resulting in approximately 2 distance measurements per second taking into account raw data processing. Energy in pulse of given laser of about 3 ➭J and the acquisition time of the measurement results in resolution of 10 cm at maximum range of 5 km given by a simulation and verified in laboratory experiments. The lidar design was made in a way that it enables the device to serve for various purposes with marginal modification or even without any modification at all. For this reason, the device could be used not only as altimeter but also as atmospheric lidar, radiometer or laser transponder.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů