description
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
specification
- Light source: laser diode 780 nm
- Maximal optical power: 10 mW
- 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.
application
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