Naslov
Broadband radiofrequency design of a laser diode bias circuit

Autori
Štimac, Hrvoje ; Gillon, Renaud ; Barić, Adrijan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
ICECom 2016 Conference Proceedings / Bonefačić, Davor ; Šipuš, Zvonimir - Zagreb, 2016, 1-6

Skup
22nd International Conference on Applied Electromagnetics and Communications (ICECom 2016)

Mjesto i datum
Dubrovnik, Hrvatska, 19.09.2016. - 21.09.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
laser diode, biasing, electromagnetic simulations, measurement, differential impedance, microstrip

Sažetak
Laser diodes are used in broadband communications including the radiofrequency range. Broadband design of a laser diode bias circuit is presented. The biasing circuit must have a high input impedance for radiofrequency signals, in order to prevent them from entering the DC power supply. The desired frequency bandwidth of the biasing circuit is up to 5 GHz. In this paper, two different biasing circuit designs are explored. Each design is simulated and optimized using electromagnetic simulation software. Based on the simulations, a series of printed circuit boards are designed and measured. It is shown that the power supply input impedance has a very small effect on the bias circuit input impedance value at high frequencies. Decreasing the resistor solder pad size and adding a slot in the ground plane achieves a significant increase in the input impedance value at high frequencies. It is shown that the new bias circuit design has a significantly higher differential impedance in the whole measurement bandwidth, and especially at high frequencies.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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