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A New Design Approach for a Programmable Optical Attenuator
The new HP 8156A optical attenuator offers improved performance, low polarization dependent loss and polarization- mode dispersion, and increased versatility. It uses a birefringence- free glass filter disk and a high-resolution, fast-settling filter drive system.
by Siegmar Schmidt and Halmo Fischer
 Article 5 - feb95a5.pdf
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