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SEOP Laser

Tunable Ultra-Narrow Band Diode Laser for Spin Exchange Optical Pumping (SEOP)


This laser system has been developed for Spin-Exchange Optical Pumping (SEOP) applications that require high power within extremely narrow absorption resonance of Rubidium (Rb) vapor. It incorporates a unique proprietary volume Bragg grating design enabling ultra-narrow laser linewidth. The complete laser system consists of a laser head, capable of delivering 30 to 65 W in a linearly polarized collimated light beam at 795 nm, a laser driver unit that also contains a chiller for water cooling, as well as an intuitive software interface. Fiber delivery with single fibers or fiber bundles and combiners is optional.


The SEOP laser is tunable more than 150 pm with constant output power.

Product features

  • Unprecedented Ultra-Narrow Linewidth of <30 GHz at High Power
  • High Pumping Efficiency of Rubidium with Low Gas Pressure for Highest Spin Exchange Rates
  • Systems available for D1 and D2 transitions of Rb and Cs
  • Minimum Thermal Load on Gas Cell
  • Tunable range >150 pm for Perfect Wavelength Matching
  • Operational Wavelength Stability within 2.5 GHz
  • Increased Electrical Efficiency



  • Wavelength: ~ 794.7 nm in air (also available: 780, 811, 852 nm)
  • Spectral linewidth, FWHM: < 20 GHz (down to 10 GHz)
  • Tuning range: 0.15 nm
  • Spectral stability: ± 2.5 GHz over 4 hours of operation
  • Amplitude stability: ± 0.5% over 4 hours of operation

Photograph of a dual-head SEOP laser at 795 nm. Each head is rated for 35 W with linewidth < 40 pm.

  • Operating temperature: 15°C to 30°C (Non-condensing)
  • Storage temperature: 10°C to 50°C (Non-condensing)
  • Mode of temperature control: PID (Proportional Integral Derivative)
  • Nominal Output power: 30-65 W
  • Laser beam delivery: Optical fibers
  • Output fiber core diameter: 600 μm
  • Numerical aperture NA: 0.22
  • Length of each ¬fiber: ~ 4 m or ~ 10 m


Weight & Dimensions

  • Size of the single Laser Head module: 55 mm × 150 mm × 40 mm
  • Size of two Laser Head modules on Cold-Plate: 150 × 150 × 60 mm
  • Weight, approx.: 3.5 kg (Two Laser Head modules on Cold-Plate
  • Shipping Weight: ~ 90 kg including chiller, electronics rack, LD power supply, and laser box
  • Laser System includes: Two 795 nm Laser Head modules; electronics rack with power supplies and TEC controllers; AR-coated high power fiber cable; GUI and control software; chiller; cables
    * Specifications are subject to change without notice