The LT-25-M is a 25 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 30 GHz. This externally modulated transmitter design provides a high spur-free dynamic range and high input intercept point performances. The LT-25-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.

• Useful Bandwidth up to 30 GHz

• Highly Linear for Analog Transmission

• High Spur-Free Dynamic Range

• Low RIN, Narrow Linewidth DFB Laser

• Broadbａnd LiNbO3 Modulator

• Status Monitoring: RS-232 (standard)

• RS-232 interface for status monitoringg

• Optical Communication to 30 Gb/s

• Widebａnd RF Transmission over Fiber

• RF/IF Signal Distribution

• Antenna Remoting

• Optical Delay Lines

• Satellite Communication