Главная » Аналитика инноваций » Новости инноваций » Компания АНГСТРЕМ анонсировала сверхточную модель измерителя длин волн лазерного излучения
Контакты English

Измерители длин волн лазерного излучения

Измерители длин волн лазерного излучения обладают различной точностью (от 1 пм до 0,02 пм) и предназначены  для измерения спектров лазеров. Такие приборы находят применение в фундаментальных физических исследованиях.

В последние годы освоены модификации приборов для работы как в ультрафиолетовой, так и в ближней инфракрасной области. Значительно улучшена элементная база приборов, что позволило добиться нового уровня быстродействия приборов, а также придать ему ряд спектроанализирующих свойств.  Измерители длин волн лазерного излучения заслужили высокую оценку российских и зарубежных исследовательских институтов, и экспортируются во многие страны мира.

Wavelength Meters - WS-Series 

Image

 

  relative accuracy absolute accuracy*
WS/5 Precision 5*10-6 3000 MHz
WS/6 High Precision 10-6 600 MHz
WS/7 Super Precision 10-7 60 MHz
WS/Ultimate Customized high end solutions, on request
  • Standard: 350 – 1120 nm
  • UV: 248 – 1100 nm
  • IR: 630 – 1750 nm
  • IR-II: 1000 – 2250 nm
  • ultra sensitive
    (< 10 nJ @ 500 nm)
  • high-speed measurement
    (up to 500 Hz)
  • cw & pulsed
  • quick coupling
  • Windows & Linux
  • USB & PCI
  • spectral profile monitoring

 

HighFinesse/Ångstrom offers sensitive and compact wavelength meters for laser sources with a large spectral range and high speed measurement. The optical unit consists of temperature-controlled interferometers that are are read by photodiode arrays. The high absolute accuracy is achieved by use of solid state, non-moving optics.

Image
Basic WLM with USB port or PCI-card

 

Standard instruments

 

Image
Surface of analyzing software 

 

Image Image
Long-term measurement WS-7 with enlarged 40 mm interferometer:
The side mode of a diode laser is easy to
observe

The optical unit and associated electronics are housed in a compact, thermal casing. The connection to a computer or notebook is via a USB port or PCI-card, which allows a high data read-out rate. The analyzing software displays all the interferometer information and is compatible with Windows or, on request, Linux. Standard features of the basic meters are:

  • Measurement of wavelength & frequency: The measurement is displayed on the computer via the supplied user-friendly software. Installation and setup is straight forward. The displayed result may be switched between wavelength, frequency or wavenumber to suit the test requirements. The displayed interferometer pattern provides information regarding the spectral profile of pulsed or continuous wave laser sources.
  • Long-term measurement: This operation mode records the measured wavelength against time. The data is displayed on the screen or may be exported for further analysis.
  • Record- and Replay Mode: This operation mode records all interferometer data and allows for a subsequent play-back. In combination with the Resolver Option (see Options), a detailed line profile analysis of the data can be performed.
  • Average: Two different arithmetic averaging techniques may be applied on 0 to 999 measurement points.
  • Data-Control: The software “DataDemo” provides an interface to different software for controlling the WLM. Source code is included.

 

Options:

 

The flexible design of the wavelength meters permits the integration of additional optical components and software modules, allowing custom solutions for customer specific applications.

Standard options include:

  • Grating Option (D): The Grating Option allows the analysis of the spectrum to an accuracy of 0.2 nm. This is applicable to laser sources with broad emission.
  • Linewidth Option (L): Linewidth measurement of a single mode laser source isis performed by a special algorithm which eliminates interferometer apparatus function. The algorithm enables the measurement of the linewidth several times better than the interferometer resolution. With multimode lasers or lasers with sidebands, the value is interpreted as FWHM of their envelope function. The longitudinal mode splitting needs to be less than 300 MHz, otherwise the linewidth of one mode will be measured.
  • Resolver Option (R): The resolver option is based on a special optical design. It enables observation of the complex multimode laser spectrum in a range of up to 10nm and see qualitatively (with specified resolution) the profile of every spectral line. Additionally, the FWHM of this profile approximation is displayed. 
  • Laser-Control Option:
  • Image
    Frequency stability of a diode laser controlled by a WS/Ultimate Deviation Signal Control
    The Laser-Control Option allows an active high speed wavelength stabilisation of laser sources. The measured signal is compared to a reference value providing an error signal for regulation. The reference wavelength and the dimension of the error signal can be selected on the software interface. The Laser-Control Option finds applications eg. in LIDAR systems in which the laser frequency has to be detuned from absorption lines in a controlled way.  
  • Mode Separation Option (S): The frequency distance between different laser beams is measured and displayed.
  • Image
    WS-7R, measuring the spectra of a laser pointer, oszillating on different modes in a range of 4 nm

  • Double-Pulse Option:
  • Image
    Simultaneous measurement of two laser wavelengths
    The Double-Pulse Option allows the measurement of two almost simultaneous laser pulses. Timing gates of at least 400 ns are applied and the emission of the two lasers is monitored. The Double-Pulse Option has applications in pump and probe experiments.

 

 

New: Test our virtual WS/7R with different laser sources on our website!

 

Image Image
IR-Wavelength Meter WS/6-IR Range of the WS/6-IR

 

Image

 

customized solutions, information, sales and distribution: HighFinesse GmbH/Ångstrom Ltd. 

 

Example Measurements

 

Image
  • Saturation spectroscopy
    The diagram shows a measurement with the WS/Ultimate on a rubidium saturation spectrum.
    Three transition lines are shown.
    Blue line: literature value.
    Red line: measurement and mean deviation.
Saturation spectroscopy on 87Rb    
   
   
Image
  • Stability of temperature
    Measurement of a WLM in a climate chamber. The thermal isolation casing contributes to the high stability of wavelength measurements.The internal temperature sensor compensates for thermal drifts.
Stability of temperature  
   
   
Image
  • Spectral sensitivity
    The diagram shows the extreme sensitivity of the WS-series. In the visible range a power of 30 nW is sufficient for full operation.

 

 

Available soon:

 

  • Multi Channel Measurement (standard or IR range)
    The combination of our high-speed wavelength meter with one of the quickest fiber switcher allows the measurement up to 8 channels almost simultaneously (< 0.2 sec/8 channels).

 

Image
Multi Channel wavelength meter for up to 8 fiber inputs

 

Image
Absolute-Frequency Standard
  • Spectral Analyser
    The Spectral Analyser performs spectral analysis of multimode laser emission in a range of about 600 nm and a resolution of 1 GHz.
  • Absolute Frequency
    The Absolute Frequency Standard (DFB-Laser) provides a reference wavelength for absolute calibration and up to 50 mW external output power as a reference Laser. The wavelength is controlled by the Doppler free spectra of a well known atomic transition.

 

 

  • WS/5-Compact
    Turns your PC into a full wavelength meter, offering all advantages of the WS-Series! The integrated unit of the size of a CD-Rom-Drive can be easily plugged into a free 5 1/4" bay on a PC.
  • Stand-Alone Device
    With the stand-alone device data can be read out and analyzed without an extra computer or notebook. Several standard ports are installed.
Image
WS/5-compact
 

 

 

 

КОНСУЛЬТАЦИИ: Компания «Ангстрем»: Image

 Тел. +7 383 334-84-80