FALC 110 & mFALC 110

Fast laser locking module

  • For linewidth reduction and phase locking (mFALC)
  • PID regulator with less than 15 ns signal delay
  • 90° phase delay at 45 MHz
  • Addresses laser current (fast) and slow element (drift)
  • Sub-Hz laser linewidths demonstrated

The Fast Analog Linewidth Control (FALC 110) is a module for advanced laser frequency stabilization tasks, such as linewidth reduction and high-bandwidth frequency locking. Due to an optimized circuit layout, the -3 dB bandwidth of the fastest signal path reaches 100 MHz.

The Mixing FALC (mFALC) additionally comprises an analog mixer for phase detection, and is designed for fast phase locking of two lasers to an external RF reference.