WS6-600 Series
High Precision Wavelength Meter
Typical Applications
The WS6-600-series offers an accuracy of 600 MHz. It is mostly used for pulsed lasers and cw laser. It is a perfect match with multimode fibers and the multichannel option taking the advantage of the broad spectral acceptance range of multimode fiber and switching technology. Therefore it offers cost-efficient, multipurpose wavelength monitoring and control.
Available Measurement Ranges
WS6-600 Standard (VIS)
330 – 1180 nm
WS6-600 UV-I
248 – 1180 nm
WS6-600 UV-II
192 – 800 nm
WS6-600 VIS /IR-I
330 – 1750 nm
WS6-600 VIS /IR-II
500 – 2250 nm
Absolute (and Other) Accuracies 1)
192 – 330 nm (with multi mode fiber)
0.6 pm
330 – 375 nm
900 MHz
375 – 800 nm
600 MHz
800 – 1180 nm
500 MHz
1180 – 2250 nm
400 MHz
Quick coupling accuracy (with multi mode fiber)
600 MHz
Wavelength deviation sensitivity/Measurement resolution 2)
20 MHz
Linewidth estimation accuracy 3)
500 MHz
Measurement Speed 4)
IR-I & IR-II: 1500 Hz; IR-III: 100 Hz; all other wavelength ranges: 950 Hz
1) According to 3σ criterion, but never better than 20 % of the laser linewidth.
2) Standard deviation.
3) Not better than 20 % of the linewidth.
4) Depending on PC hardware and settings.
Required Input Energy and Power 5)
Standard (VIS)
0.02 – 15 μJ or μW
UV-I
0.02 – 109 μJ or μW
UV-II
0.02 – 200 μJ or μW
VIS/IR-I
VIS: 0.08 – 60 µJ or µW/IR-I: 8 – 800 µW
VIS/IR-II 6)
VIS: 0.08 – 60 µJ or µW/IR-II: 8 – 320 µW
For low power instruments with increased sensitivity, please contact HighFinesse support.
FSR of the Fizeau Interferometers (Fine/Wide Mode)
16 GHz/100 GHz (each instrument in each mode can measure lasers with a linewidth up to 30 % of the correspondig FSR)
WS6-600 VIS/IR-I and WS6-600 VIS/IR-II instruments: 32 GHz/32 GHz
Calibration
Built-in calibration
Recommended calibration period ≤ 1 month
Warm-up Time
No warm-up time under constant ambient conditions; WS6-600 VIS/IR-II: > 30 min. warm-up, or until ambient equilibrium
Dimensions L × W × H
360 × 120 × 120 mm
5) The CW power interpretation in [μW] compares to an exposure of 1 s (generally the energy needs to be
divided by the exposure time to obtain the required power).
6) μJ interpretation for pulsed lasers. CW signals need more power in [μW] since the exposure is limited at IR-II instruments.
Options
External Trigger (TTL)
All wavelength meters detect and measure pulsed signals automatically. Additionally, this option allows the user to trigger pulsed measurements externally. The TTL option guarantees synchronization between pulsed excitation and measurement. It provides low-noise signals without parasitic parts when measuring pulsed signals with low duty cycles. Please note, if the option MC is ordered together with the TTL option, the TTL mode can only be used if the switch is set fixed to one input channel.
Laser Control (PID)
With the PID option it is possible to stabilize the frequency of a laser connected to the wavelength meter using a software based proportional-integral-derivative controller (PID controller). Unlike analog PID electronics, the PID option provides software based signal processing, allowing the laser to be stabilized to a specific user defined frequency or regulated with an arbitrary pattern.
This makes it extremely useful in experiments where the laser frequency has to be actively regulated or varied to fit changing experimental conditions, such as laser cooling, atomic detection, trapping and spectroscopy.
Combined with the MC option the wavelength meter can be used to stabilize multiple lasers simultaneously. The regulation speed, quality and absolute accuracy match the measurement speed, relative accuracy and absolute accuracy of the wavelength meter respectively. The measurement speed is not affected by the regulation.
Multichannel Switch (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 high-speed wavelength meters with one of the quickest fiber switches (MEMS) available allows up to eight channels to be measured almost simultaneously. Exposure time and other parameters can be defined independently for each light source. You can choose between singlemode or multimode fiber switches, depending on the required accuracy level of your measurements. Please note, if the option MC is ordered together with the TTL option, the TTL mode can only be used if the switch is set fixed to one input channel.
Linewidth Estimation (L)
The linewidth estimation of a singlemode laser source is performed by a special algorithm which eliminates the interferometer’s instrument response function. The algorithm enables the estimation of the linewidth with an accuracy better than the tenth of the instrument FSR. 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 multiline spectrum. Any instrument can be upgraded with the L-option. Singlemode fibers are required.
Spectrometer (D)
The spectrometer option allows the analysis of emission spectra to an accuracy of 6 GHz, for laser sources with broad emission. The software automatically searches the spectral section where the laser emission line is located and displays it on the screen. In combination with the additional Fizeau interferometer array this allows wide range applications with a single instrument.
External Calibration (CAL)
Standard HighFinesse wavelength meters up to an absolute accuracy of 60 MHz feature autocalibration via an integrated calibration source. This guarantees the accuracy and stability of measurements with our wavelength meters. For the higher accuracies we offer a variety of frequency stabilized, narrow linewidth, laser sources with up to ± 10 kHz frequency stability for different applications.
商品属性 [波长范围] 330 – 1180 nm