Laser for D2 line of rubidium – digital

Infrared diode laser tunable for D2 lines of Rubidium


Infrared diode laser tunable for D2 lines of Rubidium

click the photo to enlarge

  • Two modules: temperature and current driver plus laser unit
  • Laser diode switch: yes
  • Display: laser current, photodiode current, instant and set temperatures
  • Manual laser current setting
  • Laser current modulation signal input: BNC
  • Laser photodiode signal output: BNC

  • Laser current signal output: BNC
  • Laser diode protection: relay, Shottky diode, slow-start/stop
  • Internal generator for electric current modulation which is used for spectral sweep of the laser beam
  • The device is programmable from a PC via USB interface
  • Open source Linux and Windows driver sofware is supplied as well

  • Light source: laser diode 780 nm
  • Maximal optical power: 10mW
  • Beam diameter: 25 mm (1″) at a distance ca. 25 cm (10″) from laser unit
  • Tuning: temperature and current
  • External resonator: none

  • External laser diode current modulation: 12mA/V
  • External modulation range (p-p) ca. 24 mA
  • External tuning bandwidth: up to 800 MHz
  • Outputs for laser current and photodiode current signals
  • Power supply: 230 V AC, or 110 V AC on request
It is possible to change some parameters according to the customer’s needs.



This laser set is ideal as a teaching aid in student’s workshops in demonstrating basic quantum phenomena. Using our product one can get accustom to:

  • Properties and control means of laser diodes, a basic tool in contemporary labratories
  • Absorption and fluorescence phenomena
  • Optical pumping technique
  • Quantum level structure of 87Rb, a popular element used in cold atoms and Bose-Einstein condensate experiments
  • Elementary subdoppler spectroscopy
  • Saturation phenomena in atomic vapors,
  • Spectroscopic separation of isotopes and many more

The figure below shows a transmission spectrum of rubidium vapors measured with the laser and recorded by the DAQ board.

Two deep transmission minima originate from 85Rb, two shallow, at both sides – od 87Rb. Comparing their relative intensity one can measure the relative isotope abundance in natural Rb.

click the photo to enlarge


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