TEC 530 Motorized Littman/Metcalf Laser System: LION from Sacher Lasertechnik

22 Sep 2006

Sacher Lasertechnik offers a new generation of automatically tunable laser system in Littman/Metcalf configuration. The laser systems offers a high output power of typically 100mW over a large tuning range with complete user remote control.

Special features include:

Excellent tuning behavior

Coarse and fine tuning modes
Fine tuning via piezo actuator with a resolution of 10MHz
Coarse tuning via DC servo motor up to 30nm at 780nm or 830nm
Large mode-hop free tuning range of up to 100GHz and more

Narrow linewidth

Linewidth < 300kHz
Excellent side mode suppression > 50dB

High flexibility

System with wavelength of 760nm to 1080nm are available, further wavelength are under development
Free beam and fiber coupled versions available
Constant current and constant power operation modes

Plug & Play configuration

Automated wavelength tuning with wavelength and power read-out
Remote control via GPIB, RS232 and USB

Application:

Spectroscopy und optical process control
Optical cooling and trapping, BEC
Absolute distance interferometry
Laser and OPO seeding
Non-linear optical processes
Characterizing of fiber optical systems

Layout:

We have designed our TEC 530 Littman Laser according to our patented design, US-Patent no. 5,867,512, further patents pending. The laser system consists of a diode laser, collimating optics, a diffraction grating and a tuning prism. The laser light is collimated and coupled to the diffraction grating. The first order diffraction beam is coupled to a reflection prism which makes our cavity design self-aligning. The reflecting prism feeds the laser beam back to the diffraction grating where it is finally directed back into the laser chip. The rear facet beam of the laser chip is coupled out of the laser system. The major advantages of this laser design are the large mode-hop free tuning range due to the double passing of the diffraction grating and the absolute beam direction stability.

Application Example - Absorption Spectroscopy:

Absorption Spectroscopy requires a low linewidth and mode-hop free tuning behavior. Both features are fulfilled by our TEC 530 Littman laser system in an excellent way. We published our results on the atomic absorption of Rubidium and Water Vapour at the LACEA conference, NM, 2000.

Application Example - THz Spectroscopy:
THz Spectroscopy is a new investigation method for biological and medical samples. One method of generating THz radiation is to superimpose two laser beams with a difference frequency in the THz regime and to generate the THz radiation by nonlinear mixing within a nonlinear medium.

Common Specification:

Linewidth < 1MHz, typ. 0.3MHz (50ms), < 5MHz, typ. 2MHz (20s)
Side mode suppression typical 45 dB
Long term drift (24h typical 300MHz
Output Power 3mW - 100mW, depending on the actual wavelength
Coarse Tuning range 10nm - 100nm, depending on the actual wavelength
Fine Tuning (mode-hop free / total) 5GHz - 100GHz / 80GHz - 200GHz
Frequency modulation > 1kHz @ 30GHz frequency change

Contact Details:

Sacher Lasertechnik GmbH
Rudolf-Breitscheid-Str. 1-5
35037 Marburg
Germany
Phone: +49 (0) 6421 305-0
Fax: +49 (0) 6421 305-299
Email: contact@sacher.de

CONTACT DETAILS

Sacher Lasertechnik GmbH

Rudolf-Breitscheid-Str. 1-5

MARBURG

D-35037

Germany

Tel: +49 6421 305 0

Fax: +49 6421 305 299

Email Us

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