Analysis of pulsed laser diode driver system for multistate quantum key distribution

Author

Abdullah, M.S. ; Jamaludin, M.Z. ; Witjaksono, G. ; Mokhtar, M.H.H.

Author_Institution

Dept. of Electron. & Commun., Univ. Tenaga Nasional (UNITEN), Kajang, Malaysia

fYear

2010

fDate

21-24 Nov. 2010

Firstpage

1545

Lastpage

1547

Abstract

In this paper, we analyse a pulsed laser diode driver system based on MOSFET current mirror and digital signal controller (DSC) designed to emit stream pairs of photons from three semiconductor laser diodes. The DSC is capable to switch between the three laser diodes at constant rate. The duty cycle is maintained at below than 10% while the pulse width of the modulation current is set at around 30ns in order to minimize its thermal effect and thus prolong the laser diodes life cycle. The MOSFET current mirror circuits are capable of delivering constant modulation current to the laser diodes with its peak is up to 58mA resulting a peak optical power output around 7dBm.

Keywords

MOSFET; driver circuits; optical pulse generation; quantum cryptography; semiconductor lasers; MOSFET current mirror circuits; digital signal controller; duty cycle; modulation current; multistate quantum key distribution; pulse width; pulsed laser diode driver system; semiconductor laser diodes; thermal effect; laser driver; quantum key distribution; short laser pulse; six quantum states;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2010 - 2010 IEEE Region 10 Conference

Conference_Location

Fukuoka

ISSN

pending

Print_ISBN

978-1-4244-6889-8

Type

conf

DOI

10.1109/TENCON.2010.5686155

Filename

5686155