Flexible lock-in detection system based on synchronized computer plug-in boards applied in sensitive diode-laser gas spectroscopy

Author

Andersson, Mats ; Persson, Linda ; Svensson, Tomas ; Cassel-Engquist, Mdrta ; Svanberg, Sune

Author_Institution

Lund Univ., Lund

fYear

2007

fDate

17-22 June 2007

Firstpage

1

Lastpage

1

Abstract

A flexible and compact digital lock-in detection system, with software-based balanced detection for tuneable diode-laser spectroscopy measurements is described. The system is based on two data acquisition cards for a standard computer. One data acquisition card contains a software-controlled arbitrary waveform generator (CH-3150, Exacq Technologies) that is used for laser modulation. A pigtailed single mode VCSEL laser (L2K-P760-LD-SM, Laser2000) is used to scan across oxygen lines at about 760 nm. After the laser, the light is split by a single-mode fiber splitter. The scanning frequency is typically 130 Hz and a sinusoidal modulation of about 132 kHz is applied.

Keywords

data acquisition; measurement by laser beam; optical engineering computing; optical modulation; semiconductor lasers; spectrochemical analysis; surface emitting lasers; data acquisition cards; flexible lock-in detection system; laser modulation; pigtailed single mode VCSEL laser; sensitive diode-laser gas spectroscopy; single-mode fiber splitter; sinusoidal modulation; software-based balanced detection; software-controlled arbitrary waveform generator; synchronized computer plug-in boards; Data acquisition; Diodes; Fiber lasers; Frequency synchronization; Laser mode locking; Laser modes; Laser tuning; Signal generators; Spectroscopy; Tunable circuits and devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on

Conference_Location

Munich

Print_ISBN

978-1-4244-0931-0

Electronic_ISBN

978-1-4244-0931-0

Type

conf

DOI

10.1109/CLEOE-IQEC.2007.4386379

Filename

4386379