HighFinesse

Enter a new world of accuracy!

Ultimate Series

Highend Wavemeter for unrivaled precision

Ultimate Series

Highend Wavemeter for unrivaled precision

Unsurpassed Accuracy World-Wide

The HighFinesse/Ångstrom WS Ultimate is the unsurpassed high-end instrument for wavelength measurement of pulsed or continuous laser sources. It delivers superb absolute and relative accuracy to address the highest application requirements. The unmatched precision of the WS Ultimate is achieved by using two special multiple interferometer arrays in a unique geometric configuration.

Plug & Play

The WS-Ultimate is connected to the PC via a USB interface and is ready for use as soon as the software delivered with the device is installed. Both optical elements and assigned electronics are packaged in a compact, thermally insulated housing.

Customization

The flexible design of our wavelength meters allows the integration of additional optical components and software modules - even years after purchase. This way customization is enabled for your specific application requirements.

Technical Information

Measurement Range Ability

WSU2

WSU10

WSU30

Standard
(350-1120 nm)
x x x
UV-I
(248-1100 nm)
x
IR-I
(800-1750 nm)
x x

Absolute Accuracy 1

192-320 nm 2 0.1 pm 0.1 pm 0.1 pm
320-1100 nm 2 MHz 10 MHz 30 MHz
1100-2250 nm 10 MHz 20 MHz
Quick Coupling Accuracy 2 100 MHz 100 MHz 100 MHz

Measurement Speed

up to 500 Hz 500 Hz 500 Hz
1) According to 3σ criteria
2) With multimode fiber

Multi Channel (MC)

In order to measure the frequencies of more than just one laser at a time, an opto-mechanical switch is used. The combination of our highspeed wavelength meters with one of the quickest fiber switches (MEMS) available allows the measurement of up to 8 channels almost simultaneously. Exposure time and other parameters can be defined independently for each light source.

Laser Control (PID)

As opposed to bulk error signal generation, the PID option provides full signal processing, accomplished by a software-based Proportional-Integral-Derivative (PID) controller. This option is very useful in experiments where the laser frequency has to fit changing experimental conditions, such as laser cooling, atomic detection, trapping and manipulation as well as Raman spectroscopy and other experiments where the laser frequency has to be actively regulated.

The regulation speed generally is the measurement speed of the Wavelength Meter. Regulations do not slow down the measurements. The regulation quality is the same as the Wavelength Meters‘ measurement deviation sensitivity and the absolute regulation accuracy is the same as the device‘ absolute measurement accuracy.

The PID option can do even more: It provides a function generator enabling the user to make the laser’s frequency follow any arbitrary mathematical function, e.g. a sine, triangle, rectangle, stairs, trapezoid functions, etc. or any combination thereof.

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

Double Pulse Trigger (DP)

Detecting two different subsequent pulses supplied by one fiber and treating them as individual signals is possible using the double pulse option. In this mode the wavemeter is triggered externally. This allows additional applications as pump and probe measurements for instance.

Applications, Notes and Downloads

Applications

High resolution spectroscopy can be replaced by a HighFinesse / Ångstrom Wavelength Meter. Absolute measurement and regulation accuracy in MHz -range is reached in the spectral range of 350 – 1750 nm. In UV (192 – 350 nm) and MIR (2 – 11 μm) 100 MHz regulation accuracy is possible. High measurement and feedback speed for in-situ frequency control of cw-laser-sources like singlemode diode lasers, DFB lasers, Dye lasers, TiSa laser or any pulsed laser application (LIDAR) is reached.

Downloads

  • Technical Specifications WS Ultimate Download

Notes

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

 

Create PDF

Send request