MECHANICAL TYPE VARIABLE ATTENUATORS A-MV DESCRIPTION Attenuators are used in fiber optic transmission systems to reduce the optical power received by photo-detectors. The light intensity of laser diodes and LED's should be controlled to be within their dynamical range. Otherwise, excess power level can result in undesired radiation pattern, modal structure and central wavelength. Such issue is even more critical for high-speed singlemode system where the laser is very sensitive to back reflection. Controlling the light intensity emitted by the transmitter requires extra electronic circuitry. With the use of adaptor type attenuators, system tuning can now be accomplished at the destination office, immediately in front of the receiver, instead of in the field from the top of a bucket truck. This is much more convenient and can significantly speed up system installation. In addition, this will also reduce downtime in case of equipment failures. FOCI's A-MV series mechanical type variable attenuators are the most sophisticated devices suitable for all applications demanding high performance. The A-MV series come with your choice of connector terminations, including APC, ASC, FC, SC, or ST compatible connectors. With the patented mode filter design, the A-MV series can enhance mode stability dramatically and be readily panel mounted without any dummy fiber. FEATURES n n n n n n Environmentally stable Easy installation Custom designed specifications Low return loss Readily panel mountable Compact packaging APPLICATIONS n n n n n n n n n Telecommunications LAN CATV Fiber optic sensors Testing instruments Fiber to the home Multi-channel Subscriber loop Optical transmission system 9901CAT-A-Ver004.3000 A - 17 We are committed to deliver quality MECHANICAL TYPE VARIABLE ATTENUATORS PERFORMANCE SPECIFICATIONS SPECIFICATIONS Operating Wavelength Residual Attenuation Max. nm dB Attenuation Range Min. dB 45 Resolution Optical Return Loss Max. Min. dB dB 0.15 55 Polarization Sensitivity Max. dB 0.2 C C 0 to +60 -40 to +75 Operation Temperature Storage Temperature 1200 to 1600 1.5 Thermal Stability Max. dB/C 0.03 Optical Power Max. mW 300 ENVIRONMENTAL RELIABILITY TEST The performance of the attenuators has been carefully designed to meet the toughest Bellcore standards TR-NWT-000910 in the tests of : n n n n n n n n OPTICAL CHARACTERISTICS VIBRATION TEST THERMAL CYCLING IMPACT RESISTANCE SALT SPRAY EROSION THERMAL AGING HUMIDITY RESISTANCE OTHERS High Temperature Storage Test.........................................................................................85C for 336 hours Low Temperature Storage Test ........................................................................................ -40C for 336 hours Damp Heat Test...................................................................................................60C / 95% RH for 336 hours Thermal Cycling Test..............................................................................................-40C / 75 C for 336 hours Fiber Pulling Test ............................................................... 0.23Kg for 250m fiber and 900m loose tube 1.36 Kg for jacketed cable n Water Immersion Test ................................................................................................................43C, 168 hours n Vibration Test.................................................................................................. 10 ~ 5 5Hz random, 20G, 3 axis n Impact Test ...................................................................................................................8 drops, 1.8 meters high n n n n n We are committed to deliver quality A - 18 9901CAT-A-Ver004.3000 MECHANICAL TYPE VARIABLE ATTENUATORS ORDERING INFORMATION A - MV- p- p - pp - pp / pp Fiber Type A..........Corning SMF-28 TM C .........50/125m D .........62.5/125m X..........Other type of fiber Cable Type T..........900m Tight Buffer (SMF-28) Q.........3mm cable (SMF-28) X..........Others Fiber Length 01........1m 05........5m 10........10m 15........15m 20........20m XX .......Others Connector Type (input/output) NC ......None FC.......FC type SC.......SC type ST .......ST type AP.......FC/APC type AS.......SC/APC type XX .......Others 9901CAT-A-Ver004.3000 A - 19 We are committed to deliver quality PHYSICAL DRAWINGS We are committed to deliver quality A - 20 9901CAT-A-Ver004.3000