The High Finesse MCLC option combines the capabilities of the photonic crystal switch and PID option in one instrument. It can be ordered with 4 or 8 channels.

Analog Wavelength Control with the MCLC
Output directly from the MCLC (± 10 V, 16 bit) – the required
impedance at the control input of the laser: > 10 kOhm.
Downloads:
Technical Specifications Datasheet