iscan

Frequency/Wavelength

iScan

Instrument for fast and precise control of tunable laser sources

The iScan system is a universal tool for static and dynamic testing of the mode properties of tunable lasers. But it allows for even more:

  • Fast and precise scanning of tunable lasers
  • Stepping to different arbitrary wavelengths
  • Surveillance of the scan behavior of tunable lasers
  • Measurement of the wavelength stability of tunable lasers
  • Suppression of mode hops or mode instabilities

Iscan

LaseLock

Universal and compact Laser Stabilization Electronics

LaseLock is a universal and compact laser stabilization electronics (lock-box) that allows to stabilize tunable lasers (like e.g. diode lasers, Ti:Sapphire or dye lasers) in their frequency. For this, particularly optical resonators (Fabry-Perot cavities) and atomic absorption or fluorescence lines are serving as references. Vice versa, also optical resonators can be stabilized towards a given laser frequency by means of mechanical actuators (e.g. piezo actuators). Two different methods can be applied: side-of-fringe stabilization and top-of-fringe stabilization (stabilization to maximum (or minimum), 'lock-in'-technique).

The LaseLock conveniently combines the following components in a compact and user-friendly box:

  • Input amplifiers (incl. generation of difference and/or normalisation signal)
  • Sine generator
  • Phase-synchronous detection
  • PID regulator
  • Scan generator
  • Output amplifier

LaseLock 

Digital LaseLock


CoSy-Compact Spectroscopy module

Compact Unit for Doppler-free Absorption Saturation Spectroscopy

The CoSy system is a versatile tool for Doppler-free absorption saturation spectroscopy. This permits a generation of extremely precise defined wavelength standards, which can be used for highly precise stabiliziation of tunable lasers.

  • The CoSy head contains the setup for the Doppler-free saturation spectroscopy. It is available with Cesium-, Rubidium- or Potassium cells (other cells on request)
  • The CoSy head is controlled by the power supply and control electronics CoSyControl mini.

Usually Doppler-free absorption saturation spectroscopy is achieved by using a relatively complex opto-mechanical setup. This setup has been integrated in the described small compact unit, together with the electronics needed for evaluation of the detected beams.

At the outputs a 'Doppler-free absorption saturation spectrum' is directly available and can be visualized on e.g. an oscilloscope. Thus, the used laser can be stabilized towards the detected atomic lines. This can be achieved for example with the stabilization electronics LaseLock. As a result, long-term stabilized absolute laser frequency drifts below 1 MHz are possible. This corresponds to an extreme resolution of approximately 10-9.

CoSy