12 Mar 2009 The D2-115 laser servo was designed for high-speed and low noise servo control of lasers. The D2-115 laser servo was designed for high-speed and low noise servo control of lasers. The PI2D loop filter, with a second integral feedback to boost low-frequency gain, provides tight locking to the error signal. Both side-lock and peak-lock modes are supported, with internal demodulation circuitry for peak-lock mode. Additionally, the D2-115 provides an internal ramp generator for sweeping the output and computer control to break lock and directly control the output voltage.
A fast transfer function tailored to the injection current ensures the tightest lock. Double integrators give high DC gain and stability. 4 MHz FM sideband modulation in peak lock mode enables the laser servo to be used for Pound-Drever-Hall locking to optical cavities. |
