A compact fiber variable optical attenuator (VOA) with <1-dB insertion loss and >25-dB dynamic range is proposed and demonstrated at the 1550-nm band using a fiber collimator lens and a bulk-micromachined deformable micromirror. Three versatile VOA designs are presented that exploit the principle of 3-D beam spoiling to achieve broadband polarization insensitive attenuation using simple single-drive controls.
KEYWORDS: Digital micromirror devices, Profiling, Micromirrors, Optical beam profilers, Photodetectors, Optical testing, Gaussian beams, Power meters, High power lasers, Attenuators
To the best of our knowledge, proposed and demonstrated for the first time is an optical power independent optical beam profiler instrument. The instrument uses a pair of symmetrically located power detection photodetectors along with an electronically programmed two-dimensional digital micromirror device to implement spatial beam profiling. The instrument also features high-repeatability all-digital controls and fast millisecond reconfigurations. The instrument can have a critical impact in test, measurement, and monitoring systems for various optical beams, including high-power laser beams.
KEYWORDS: Digital micromirror devices, Profiling, Micromirrors, Sensors, Optical beam profilers, Optical testing, Beam analyzers, Photodetectors, High power lasers, Microelectromechanical systems
An all-digital laser beam profiler instrument is proposed and demonstrated that for the first time can provide real-time and full-repeatability multi-technique profiling with high power (e.g.,>10kW/cm2) laser beams.
A new robust approach is presented for achieving very large fiber port count all-optical crossconnect switches. This three dimensional optics-based switch has built-in alignment capabilities with fault-tolerance, allowing graceful port count scaling.
SMPTM technology is described that intelligently uses the spatial nature of light to form fiber-optic components and modules that provide fault-tolerance and improved optical signal setting speeds.
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