A Variable Optical Attenuator (VOA) is a photonic device that reduces the power of an optical signal by a controllable, adjustable amount without converting it to an electrical signal. VOAs are used in fiber-optic communication systems to balance channel power levels, prevent receiver saturation, and test network components under varying signal conditions. They are key components in wavelength-division multiplexing systems, optical amplifier design, and reconfigurable optical add-drop multiplexer architectures used in modern optical transport networks.
We demonstrate a low-cost wavelength selectable distributed vibration sensor to monitor the whole routes in a 1×32 PON architecture with a unified sensitivity. The results obtained from the lab and a field testbed are presented.
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NEC Laboratories America, Inc. (NEC Labs) is the US-based center for NEC Corporation’s global network of corporate research laboratories. Our diverse research groups collaborate with industry, academia and governments to provide disruptive solutions to complex problems. A leader in the integration of IT and network technologies with more than 100 years of expertise, NEC provides a combination of products and solutions that cross-utilize the company’s experience and global resources to meet the complex and ever-changing needs of its customers.