Wavelength Meters
HighFinesse laser measurement equipment
- Unmatched absolute accuracy down to 2 MHz
- Measurement ranges from UV to IR (192 nm .. 11 µm)
- For pulsed and cw lasers
- Sensitivity down to nW light power
- Up to 600 Hz acquisition speed
The wavelength meters of the WS series accomplish wavelength measurements with highest accuracy. Both cw and pulsed lasers with narrow-band emission can be examined, monitored and even actively controlled. Various models of the WS series are available, covering UV to IR wavelength ranges (192 nm - 11 µm). Based on a rugged Fizeau interferometer setup without any moving components, the wavelength meters provide quasi unlimited lifetime.The spectrum analyzers LSA and HDSA allow for multi-line or broadband spectrum of light sources like cw and pulsed lasers, gas discharge lamps, super luminescence diodes, semiconductor laser diodes and LEDs.
- Technical Information
WS5 WS6-600 WS6-200 WS7-60 WS8-30 WS8-10 WS8-2 Measurement range UV-II (192 – 800 nm) ✓ ✓ ✓ ✓ UV-I (248 – 1180 nm) ✓ ✓ ✓ ✓ ✓ ✓ Standard (330 – 1180 nm) ✓ ✓ ✓ ✓ ✓ ✓ ✓ VIS / IR-I
(330 – 1750 nm) 17)✓ ✓ ✓ IR-I (630 – 1750 nm) ✓ 22) ✓ ✓ VIS / IR-II
(500 – 2250 nm)17)✓ ✓ ✓ IR-II (1000 – 2250 nm) ✓ 20) IR-III (1400 – 11000 nm) ✓ ✓ Absolute accuracy 1) 192 – 330 nm 2) 3 pm 0.6 pm 0.4 pm 0.2 pm 0.1 pm 0.1 pm 330 – 420 nm 2 pm 0.3 pm 0.2 pm 0.04 pm 0.02 pm 0.01 pm 0.01 pm 420 – 1100 nm 3000 MHz 600 MHz 200 MHz 60 MHz 30 MHz 10 3) 2 4) 1100 – 2250 nm 2000 MHz 400 MHz 150 MHz 40 MHz 20 MHz 10 3) 1400 – 11000 nm 3000 MHz 200 MHz Quick coupling accuracy
(with multi mode fiber)3000 MHz 600 MHz 600 MHz 5) 150 MHz 100 MHz 100 MHz 100 MHz Wavelength deviation sensitivity/Measurement resolution 6) 500 MHz 20 MHz 4 MHz 21) 2 MHz 1 MHz 0.4 MHz 0.2 MHz 19) Linewidth option Estimation accuracy 7) 2000 MHz 500 MHz 400 MHz 200 MHz 100 MHz 100 MHz 100 MHz Measurement speed (Hz) 950
(IR: 1500,
IR-III: 100)950
(IR: 1500) 8)
500
(IR: 1500,
IR-III: 100) 8)500
500
500
500
Required inputenergy
and power 9)Standard (VIS) 0.02 – 15 μJ 0.02 – 15 μJ 0.02 – 15 μJ 0.02 – 15 μJ 0.08 - 60 μJ 0.08 - 60 μJ 0.08 - 60 μJ UV-I 0.02 – 10 μJ 0.02 – 10 μJ 0.02 – 10 μJ 0.02 – 10 μJ 0.02 – 40 μJ UV-II 0.02 – 200 μJ 0.02 – 200 μJ 0.02 – 200 μJ 0.02 – 400 μJ IR-I 2 – 200 μJ 2 – 200 μJ 2 – 200 μJ 2 – 200 μJ 2 – 800 μJ 2 – 800 μJ IR-II 10) 2 – 80 μJ 2 – 80 μJ 2 – 80 μJ 2 – 80 μJ 2 – 800 μJ IR-III 1 mW 1 mW μJ FSR of the Fizeau interferometers
(Fine/wide mode) 11)100 GHz 16/100 GHz 12) 16/100 GHz 13) 8/32 GHz 4/32 GHz 2/20 GHz 2/20 GHz Calibration 18) Built-in calibration 14) Built-in calibration 15) Stabilized HeNe laser or any other well known lasersource Δν < 5 MHz SLR-780 or any other well known laser sourceΔν
< 2 MHzI2 stabilized HeNe or any well knownlaser sourceΔν
< 1 MHzRecommended calibration period ≤ 1 month ≤ 14 days ≤ 10 hours ≤ 1 hour ≤ 2 minutes Warm-up time No warm-up time under constant ambient conditions 16) > 30 minutes Dimensions L × W × H mm³ 360 × 120 × 120 360 × 120 × 120 360 × 200 × 120 360 × 200 × 120 360 × 200 × 120 360 × 200 × 120 360 × 200 × 120 Weight 2.8 kg 2.8 kg 5.5 kg 18) 5.9 kg 6.1 kg 6.4 kg 6.4 kg Interface High-speed USB 2.0 connection Power supply Power consumption < 2.3 W, power provided directly via USB cable
IR-II, IR-III: external power supply included;
WS7-60 IR-I, WS8-30 IR-I, WS8-10 IR-I: external power supply included1) According to 3σ criterion, but never betterthan 20 % of the laser linewidth.
2) With multimode fiber.
3) ± 200 nm around calibration wavelength; outside of this range the accuracy is 30 MHz.
4) ± 2 nm around calibration wavelength; outside of thisrange the accuracy is 10 MHz; note 3 also applies.
5) 200 MHz for WS6-200 IR-III.
6) Standard deviation. WS6-200 and higher modelsrequire singlemode or photonic cr ystal fibers to reachthis resolution.
7) Not better than 20 % of the linewidth.
8) Depending on PC hardware and settings. Highspeedmodels up to 76 kHz available.
9) The CW power interpretation in [μW] compares to anexposure of 1s (generally the energy needs to be dividedby the exposure time to obtain the required power).
10) μJ interpretation for pulsed lasers. CW signals needmore power in [μW] since the exposure is limited atIR-II instruments.
11) Each instrument in each mode can measure lasers witha linewidth up to 30 % of the correspondig FSR.
12) For IR instruments: 32/32.
13) For IR-I and IR-II instruments: 16/16,for IR-III instruments: 8/80.
14) IR-III: external calibration source needed, e.g. SLR-1532.
15) IR instruments: external calibration source needed,e.g. SLR-1532.
16) IR-II: > 30 min. warm-up, or until ambient equilibrium.
17) These instruments have a decreased sensitivity by afactor of 4, compared to the Standard and IR ranges in the required input fields, respectively.
18) 2.8 for IR-I and IR-II.
19) 100 kHz for special ranges on request.
20) Photonic cr ystal switches can be used up to 2000 nm.Please contact HighFinesse if you want to measureover 2000 nm.
21) IR-III: 20 MHz.
22) Measurement range WS7-60 IR-I: 530 – 1750 nm. - Options
MultiChannel option for simultaneous measurement of several lasers.
- Applications
- Literature
- Article: Solid state etalons improve wavelength measurement
- Application Note: Diode Laser Locking and Linewidth Narrowing
- Article: C. Nölleke et al, Absolute Frequency Atlas from 915 nm to 985 nm based on Laser Absorption Spectroscopy of Iodine (2018)
- Related Products
- Downloads
- Brochure: HighFinesse High Precision Wavelength Meters
- Brochure: HighFinesse Spectrometers
- Brochure: HighFinesse Linewidth Analyzer
- Quick Start Guide: WS-Series