SPS20 Cagire Low-Noise AC/DC Power Supply


  • 19″ compatible
  • Pluggable 3U/220mm
  • Occupied width 10HP (51mm)
  • 230V or 115V AC input
  • Chassis isolated output
  • 3 options
    • +5V/3A
    • +15V/1.5A
    • +24V/1A
  • High control accuracy – low residual ripple
  • Linear control – low EMI
  • High reliability
  • Ultra-low voltage noise
    • Density  ≤ 3 nV/√Hz
    • Ripple ≤  1mV RMS

Contact Sisyph


  • Low-noise DC power supply
  • Laser frequency stabilization
  • Opto-electronic oscillator
  • OPLL – Phase-locked lasers
  • Ultra-low noise current controller
  • Laser diode controller
  • RF noise sensitive prototyping


The SPS20 Cagire is a low-noise power supply based on a linear AC/DC converter. It was first designed to provide a quiet environment to operate our ultra-low noise laser current source (SMC-Series). For this purpose, three SPS20 modules are assembled in a 3U desktop case (SR100 Estélas) to power up to 2 complete
laser diode controllers and their dedicated laser frequency control electronics (SMA– and SMB-Series).
Because they have little to no ability to reject supply variations, many RF subsystems should also benefit from the low-noise features of the SPS20-Series to prevent unwanted side bands and low signal-to-noise ratio.

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