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| COMMUNICATIONS COMPONENTS Variable Slope Attenuators VSA Series Key Features * Low insertion loss * Wide attenuation slope range * Available in low and high contrast variants * Available in positive or negative slope variants * Low tuning voltage * Mountable on a PCB Applications * Remove cumulative error function from amplifiers and filters * Correct variations in amplifier gain profile due to add-drop multiplexing and Raman effect * Balance channel power in reconfigurable networks The JDSU variable slope attenuator (VSA) equalizes uneven gain profiles inherent to the use of optical amplifiers. The VSA is Telcordia GR 1209 and 1221 compliant and uses hermetic sealing for increased resistance to environmental extremes. It is available in low contrast and high contrast variants, and offers excellent positive or negative slope optical performance in either the C or L bands. The attenuation slope is precisely tuned using a stepper motor driven by an external IC driver. The stepper motor adjusts the slope in small, uniform step sizes, thus providing high resolution. The VSA is compact in size and can easily be mounted on a printed circuit board (PCB). It requires minimum voltage. The electrical pins extrude from the bottom of the package. The spectral diagram on next page shows the transmission spectrum after passing through the VSA. Both positive and negative slope profiles are available. Compliance * Telcordia GR 1209 and 1221 NORTH AMERICA: 800 498-JDSU (5378) WORLDWIDE: +800 5378-JDSU WEBSITE: www.jdsu.com VSA SERIES 2 Performance (Note: Negative slope and low contrast variant) 0 -1 -2 Loss (dB) -3 -4 -5 -6 -7 1525 Start +250 +415 +580 +750 +165 +330 +500 +660 End 1530 1535 1540 1545 1550 1555 1560 1565 1570 Wavelength (nm) Specifications Parameter Optimized wavelength range C band L band Insertion loss at minimum slope1,2 Insertion loss at maximum slope1,2 Loss contrast at maximum slope1 Minimum loss slope1 Linearity Polarization dependent loss Polarization mode dispersion Return loss1 Repeatability3 Resolution Backlash Fiber type Maximum optical power Dimensions (W x H x D)4 Operating temperature Storage temperature 1. Excluding connectors. 2. Measured at MIN for negative slope and at MAX for positive slope. 3. With reference to potentiometer voltage at 25 C. 4. Excluding strain relief and connector pins. High Contrast Low Contrast Maximum Maximum Minimum Maximium Maximum Maximum Minimum Typical Typical Typical Maximum 1530 to 1560 nm 1528 to 1565 nm 1570 to 1610 nm 1568 to 1609 nm 1.3 dB 1.3 dB 2.2 dB 2.0 dB 7.0 dB 4.0 dB 0.02 dB/nm 0.02 dB/nm 1.0 dB (absolute) 0.5 dB (absolute) 0.25 dB 0.25 dB 0.1 ps 0.1 ps 40 dB 35 dB 0.003 dB/nm 0.002 dB/nm 0.003 dB/nm 0.002 dB/nm 0.003 dB/nm 0.002 dB/nm SMF-28 with 900 m buffered jacket or 250 m bare fiber 200 mW 200 mW 25 x 12 x 50 mm 25 x 12 x 50 mm -5 to 70 C -5 to 70 C -40 to 85 C -40 to 85 C VSA SERIES Ordering Information For more information on this or other products and their availability, please contact your local JDSU account manager or JDSU directly at 1-800-498-JDSU (5378) in North America and +800-5378-JDSU worldwide or via e-mail at customer.service@jdsu.com. Sample: VSA-0CNHC10NC VSA-0 Code C L Wavelength C band L band Code H L Contrast Level High contrast Low contrast Code 10 15 Fiber Length1 1.0 m 1.5 m Code NC FP FA SC SU SP MU Connector No connector FC/HPC FC/APC SC/HPC SC/APC ST/HPC MU Code N P Slope Negative slope Positive slope Code C E Fiber Type 9/125/900 fiber 9/125/250 fiber 1. Other fiber length available upon request. SMF-28 is a registered trademark of Corning Incorporated. All statements, technical information and recommendations related to the products herein are based upon information believed to be reliable or accurate. However, the accuracy or completeness thereof is not guaranteed, and no responsibility is assumed for any inaccuracies. The user assumes all risks and liability whatsoever in connection with the use of a product or its application. JDSU reserves the right to change at any time without notice the design, specifications, function, fit or form of its products described herein, including withdrawal at any time of a product offered for sale herein. JDSU makes no representations that the products herein are free from any intellectual property claims of others. Please contact JDSU for more information. JDSU and the JDSU logo are trademarks of JDS Uniphase Corporation. Other trademarks are the property of their respective holders. (c)2007 JDS Uniphase Corporation. All rights reserved. 21025483 Rev. 002 10/05 VSA.DS.CC.AE NORTH AMERICA: 800 498-JDSU (5378) WORLDWIDE: +800 5378-JDSU WEBSITE: www.jdsu.com Reviewed February 2007 |
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