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Laser Spectrum Analyzer

Spectrometer for Broadband Sources

Laser Spectrum Analyzer

Spectrometer for Broadband Sources

The LSA is designed to analyse the multi-line or broadband spectrum of light sources up to 10 nm like cw and pulsed lasers, gas discharge lamps, super luminescence diodes, semiconductor laser diodes and LEDs.
 

Plug & Play

The wavelength meter is ready for use as soon as the software delivered with the device is installed. There is no warm-up time required. Power supply and data readout are accomplished with any PC via a USB interface.
 

Custom designs on request!

Depending on the bandwidth of the spectrum we can achieve the best achievable resolution. Specify your light source and we can choose the most fitting order of diffraction!

Technical Information

Measurement Range Ability

Standard 350 - 1120 nm
UV-I 248 - 1100 nm
Vis-UV-II 192 - 1190 nm
IR-I 800 - 1750 nm
IR-II 1000 - 2250 nm
IR-III 2 - 11 µm

Absolute Accuracy 1

192 - 370 nm 2 6 pm
370 - 1100 nm 6 GHz
1100 - 1750 nm 20 GHz
1750 - 2250 nm 25 GHz
2250 nm - 11 µm 1 - 5 nm 4
Quick Coupling Accuracy 2 20 GHz

Spectral Resolution (λ/Δλ) 5

Standard, UV 20000 (single-mode fiber), 10000 (multi-mode fiber)
IR-I 4000 (single-mode fiber), 2000 (multi-mode fiber)
IR-II 2800 (single-mode fiber), 2000 (multi-mode fiber)

Linewidth High Stage

Accuracy 10 % of laser linewidth
Min. Linewidth Std, UV: 3000 6; IR: 40 GHz 7
Max. Linewidth 1.5 THz

Measurement Speed 3

Data Acquisition 500 Hz
Full Spectrum Calculation 40 Hz / GHz
1) According to 3σ criteria
2) With multimode fiber
3) Depending on PC hardware and settings
4) Depends on measurement range: plase contact technical support
5) Over the entire spectral range
6) But not better than 5 % of the linewidth
7) But not better than 10 % of the linewidth

Linewidth Measurement (L)

The linewidth estimation of a single-mode laser source is performed by a special algorithm which eliminates the interferometer’s instrument response function. The algorithm enables the estimation of the linewidth several times better than the spectral resolution of the instrument.

The linewidth option can also be used for measuring the linewidth of multimode lasers or lasers with sidebands. In this case, the longitudinal mode splitting needs to be less than the instruments spectral resolution and the calculated result is the FWHM of the envelope function of the multi-line spectrum. Any instrument can be upgraded with the L-option, except IR3 devices. Single mode fibers are required.

External Trigger (TTL)

Usually all wavemeters detect and measure pulses automatically. This option allows the user to trigger pulsed measurements externally. There are two different ways to trigger. In mode 1 the TTL-pulse starts the read out of the arrays. Afterwards the CCD-arrays are illuminated until the next TTL-pulse is detected. In mode 2, the TTL-pulse starts the measure ment for a user-defined period of time.

The TTL option guarantees synchronization between pulsed excitation and measurement. It provides low-noise, pollution-free signals when measuring pulsed signals with low duty cycles

Applications, Notes and Downloads

Applications

Multi-line or broadband spectra of light sources up to 10 nm like cw and pulsed lasers, gas discharge lamps, super luminescence diodes, semiconductor laser diodes and LEDs.

Downloads

Notes

For further technical information, application examples, diagrams and for customization please contact: info@highfinesse.de

 

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