Fiber-optic color synthesizer

Abstract

Full-color synthesis was achieved, for what we believe is the first time, utilizing a novel 3x1 hard polymer-clad fiber coupler along with red, green, and blue (RGB) LED primaries. By using RGB LEDs that are coupled to three input ports, the device rendered full color from the output port with a circular emitting pixel of 135 microm in diameter with an extended color gamut. The proposed fiber-optic color synthesizer can provide a compact waveguide solution for the beam scanning display and the tunable pure white source for LED backlighting.

Acousto-optic control of speckle contrast in multimode fibers with a cylindrical piezoelectric transducer oscillating in the radial direction

“…Coherent light delivery over MMFs has continuously gained attention and interest for many imaging applications such as direct image delivery [2], analog video signal transmission [5], and fiber-based color synthesis [6,7], and has been accompanied by a demand for efficient and fast control of the speckle contrast. The acousto-optic modulation technique based on a piezoelectric transducer (PZT) could provide a common solution platform for MMF laser delivery applications.…”

Synthesis of pure white color and its equal power, equal chromatic splitting through a novel 3??3 fiber optic visible multiplexer

“…Fiberized tunable white color source and fiber optic devices in the visible range would contribute to fulfill immediate future needs in optical technologies in various emerging areas. Recently a novel fiber optic color synthesizer (FOCS) has been reported based on 1×3 hard plastic cladding fiber (HPCF) coupler along with solid state RGB LEDs by one of the authors, which could serve as a micro scanning display color source [6].…”

“…In this study, we further developed the fiber optic fused taper technology from one output port device 1×3 fiber multiplexer [6] into three output port 3×3 fiber optic color synthesizer to realize a unique microscopic tunable white color source transforming red, green, blue (RGB) inputs into three white color outputs of the same color coordinate and equal power, which has not been achieved previously. In three outputs of the proposed device, tunability in white color temperature along with excellent uniformity in terms of both chromaticity and optical power splitting ratio was achieved for the first time to the best knowledge of the authors.…”