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Proceedings Paper

Application of DDS in laser modulation
Author(s): Zhang Zhang; Jinhong Lu; Yunfei Xu; Zhaoying Wang; Qiang Lin
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Paper Abstract

Acousto-optic modulator (AOM) and electro-optic modulator (EOM) drived by voltage controlled oscillator (VCO) are widely used to control and modulate laser, especially semiconductor lasers. We designed a frequency generator based on direct digital synthesizer (DDS) technology which can be used to replace VCO. The frequency generator with high frequency stability can reach 160 MHz bandwidth and frequency resolution up to 1 Hz. The output frequency is programmable and controlled by input TTL edge. These advantages are not available with VCO. We obtain a output radio frequency (RF) power as high as 1W with a power amplifier in order to drive an AOM. This device has been used to scan the wavelength of external cavity laser diode (ECLD) in our laser cooling experiments.

Paper Details

Date Published: 7 January 2008
PDF: 6 pages
Proc. SPIE 6824, Semiconductor Lasers and Applications III, 68241Q (7 January 2008); doi: 10.1117/12.757714
Show Author Affiliations
Zhang Zhang, Zhejiang Univ. (China)
Jinhong Lu, Zhejiang Univ. (China)
Yunfei Xu, Zhejiang Univ. (China)
Zhaoying Wang, Zhejiang Univ. (China)
Qiang Lin, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 6824:
Semiconductor Lasers and Applications III
Lianghui Chen; Hiroyuki Suzuki; Paul T. Rudy; Ninghua Zhu, Editor(s)

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