The LT-20-M is a 20 GHz bandwidth lightwave transmitter module designed for RF over fiber, antenna remoting and broadband RF transmission applications using single mode optical fiber. This module uses a low noise, narrow linewidth, 1550nm distributed feedback (DFB) laser diode as Continuous Wave (CW) light source. A broadband Lithium Niobate (LiNbO3) optical modulator is employed to provide the linear modulation capability that has a modulation bandwidth of up to 20 GHz. This externally modulated transmitter design provides a high spur-free dynamic range and high input intercept point performances. The LT-20-M can also be used for digital transmission when driven by a wideband modulator driver.
The DFB laser’s temperature stability is controlled with the use of an internal TEC. The optical modulator is controlled via a high precision bias controller to ensure the operation is set to quadrature. This design enables LT-20-M to provide with the lowest distortion and wide modulation bandwidth. The transmitter provides status monitoring through an RS-232 serial port interface.

Applications:
Optical Communication to 25 Gb/s
Wideband RF Transmission over Fiber
RF/IF Signal Distribution
Antenna Remoting
Optical Delay Lines
Satellite Communication

Features:
Useful Bandwidth up to 25 GHz
Highly Linear for Analog Transmission
High Spur-Free Dynamic Range
Low RIN, Narrow Linewidth DFB Laser
LiNbO3 Optional Modulator with 20 GHz Bandwidth
Status Monitoring: RS-232 (option)
RS-232 interface for status monitoring