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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 1 THz like cw and pulsed lasers, gas discharge lamps, super luminescence diodes, semiconductor laser diodes and LEDs.

Plug & Play

The LSA 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 330 - 1180 nm
UV-I 248 - 1100 nm
UV-II 192 - 800 nm
Vis-UV-II 192 - 1180 nm
Vis-IR-I 330 - 1750 nm
IR-I 630 - 1750 nm
IR-II 1000 - 2250 nm
IR-III 1400 - 11000 nm

Absolute Accuracy 1

192 - 330 nm 2 6 pm
330 - 420 nm 3 pm
420 - 1100 nm 6 GHz
1100 - 1750 nm 12 GHz
1750 - 2250 nm 25 GHz
2250 nm - 11 µm 1 - 5 nm 3
Quick Coupling Accuracy 2 20 GHz

Spectral Resolution (λ/Δλ) 4

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)
IR-III 15 - 30 nm (multi-mode fiber) 3

Linewidth High Stage

Accuracy not better than 10 % of laser linewidth 3
Max. Linewidth 1.5 THz (15 THz broadline version)

Measurement Speed 5

Data Acquisition 500 Hz
Full Spectrum Calculation 40 Hz / GHz

1) According to 3σ criteria
2) With multimode fiber in standard range
3) Depends on measurement range: plase contact technical support
4) Over the entire spectral range
5) Depending on PC hardware and settings

Linewidth Measurement (L)

LSA always include the linewidth option (L) automatically.

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


Multi-line or broadband spectra of light sources up to 1 THz like cw and pulsed lasers, gas discharge lamps, super luminescence diodes, semiconductor laser diodes and LEDs.



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


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