MX10A, MX40A Modulator Driver
Chapter 3: Introduction
Rev B, October 5, 2017
Page 5
3.4. Block
Diagram
These instruments provide all the electronics and control circuitry to bias and drive high-speed, fiber-coupled,
intensity or phase modulators. The user supplies the laser source, the signal source, and the modulator of their
choice. The Laser In port uses PM fiber with light linearly polarized along the slow axis as shown on the front
panel. Maximum input power is 20 dBm (100 mW). Optical power is monitored in three places (Mon-1,-2,-3) for
the purpose of enabling bias and power control. These power values are also available at the I/O port. Mon-1 is at
the Laser Input, Mon-2 is at the modulator Output, and Mon-3 is at the final Optical Output.