DD Variable Optical Attenuators

Electronically Controlled; Fiber Type SM, MM, PM (PANDA); 350 to 2050 nm; Connector Type NTT-FC/PC, ST, SC, other; Attenuation IL to 40, 60 dB

OZ Optics DD series of compact PC board mountable motor driven variable attenuators with low backreflection offers excellent speed, repeatability, and accuracy. Single mode and polarization maintaining (PM) attenuators utilize a novel blocking style attenuation technique, while multimode attenuators use a variable neutral density filter to minimize mode dependent losses. Both types feature a homing sensor to calibrate the attenuator, removing the need to use external taps, and a jam-proof tuning mechanism.The PC version uses a reliable stepper motor that can be controlled by an external driver. The basic model allows direct access to the stepper motor, as well as a logic level output for HOME position information. The -DR option adds a high-speed driver circuit that accepts four logic level inputs to control the stepper motor. Finally, the -MC option features an embedded microcontroller with a programmed calibration curve. The units are addressable and support RS232, SPI, or I²C communication protocols.AMS Technologies and OZ Optics can also customize the design to fit your needs. There are smaller and faster versions if lower resolution is acceptable. Contact AMS Technologies for detailed specifications.

Key Features:

• Stepper Motor Driven
• High Power Handling, High Speed and High Resolution
• Wide Attenuation Range (from 350 to 2050 nm)
• Wide Wavelength Range
• Low PDL and Wavelength Dependency
• Low Insertion Loss and Backreflection
• Rugged and Compact Design
• Computer Interface (-MC Version)
• SM, MM and PM Fiber Versions Available

Applications: Active Gain Equalization in DWDM Systems; Local Power Monitoring and Feedback Attenuator Settings; Bit Error Testing; Trouble Shooting Receivers and Other Active Fiber Optic Components; Simulating Long Distance Fiber Transmission; Design of Fiber Optic Transmitter/Receiver Circuitry; Power Meter Linearity Checks; Power Setting and Power Control; OCT Systems