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.

  • Wavelength Meters
  • Technical Information

      WS5WS6-600WS6-200WS7-60WS8-30WS8-10WS8-2
    Measurement rangeUV-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 pm0.6 pm0.4 pm0.2 pm0.1 pm0.1 pm 
    330 – 420 nm2 pm0.3 pm0.2 pm0.04 pm0.02 pm0.01 pm0.01 pm
    420 – 1100 nm3000 MHz600 MHz200 MHz60 MHz30 MHz10 3)2 4)
    1100 – 2250 nm2000 MHz400 MHz150 MHz40 MHz20 MHz10 3) 
    1400 – 11000 nm3000 MHz 200 MHz    
    Quick coupling accuracy
    (with multi mode fiber)
    3000 MHz600 MHz600 MHz 5) 150 MHz100 MHz100 MHz100 MHz
    Wavelength deviation sensitivity/Measurement resolution 6)500 MHz20 MHz4 MHz 21)2 MHz1 MHz0.4 MHz0.2 MHz 19)
    Linewidth optionEstimation accuracy 7)2000 MHz500 MHz400 MHz200 MHz100 MHz100 MHz100 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 μJ0.02 – 15  μJ0.02 – 15 μJ0.02 – 15 μJ0.08 - 60 μJ0.08 - 60 μJ0.08 - 60 μJ
    UV-I0.02 – 10 μJ0.02 – 10 μJ0.02 – 10 μJ0.02 – 10 μJ0.02 – 40 μJ  
    UV-II0.02 – 200 μJ0.02 – 200 μJ0.02 – 200 μJ0.02 – 400 μJ   
    IR-I2 – 200 μJ2 – 200 μJ2 – 200 μJ2 – 200 μJ2 – 800 μJ2 – 800 μJ 
    IR-II 10)2 – 80 μJ2 – 80 μJ2 – 80 μJ2 – 80 μJ2 – 800 μJ  
    IR-III1 mW 1 mW μJ    
    FSR of the Fizeau interferometers
    (Fine/wide mode) 11)
    100 GHz16/100 GHz 12)16/100 GHz 13)8/32 GHz4/32 GHz2/20 GHz2/20 GHz
    Calibration 18)Built-in calibration 14) Built-in calibration 15)Stabilized HeNe laser or any other well known lasersource Δν < 5 MHzSLR-780 or any other well known laser sourceΔν
    < 2 MHz
    I2 stabilized HeNe or any well knownlaser sourceΔν
    < 1 MHz
    Recommended calibration period≤ 1 month≤ 14 days≤ 10 hours≤ 1 hour≤ 2 minutes
    Warm-up timeNo warm-up time under constant ambient conditions 16) > 30 minutes
    Dimensions L × W × H mm³360 × 120 × 120360 × 120 × 120360 × 200 × 120360 × 200 × 120360 × 200 × 120360 × 200 × 120360 × 200 × 120
    Weight2.8 kg2.8 kg5.5 kg 18)5.9 kg6.1 kg6.4 kg6.4 kg
    InterfaceHigh-speed USB 2.0 connection
    Power supplyPower 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 included

    1) 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.

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