The University of Arizona

University of Central Florida Research Foundation Inc

Arizona Board of Regents, a Body Corporate

Axel Schulzgen

Nasser N Peyghambarian

Jacques Albert

Shuo Pang

Xiushan Zhu

Seppo Honkanen

Rodrigo Amezcua-Correa

Valery Temyanko

Jian Zhao

Li Ll

Li Li

Yangyang Sun

Jose Enrique Antonio Lopez

A flexible, artifact-free, and lensless fiber-based imaging system for biological objects. This system combines image reconstruction by a trained deep neural network with low-loss image transmission through disordered glass-air Anderson localized optical fiber. High quality images of biological objects can be obtained using short (few centimeters) or long (more than one meter) segments of disordered fiber with and without fiber bending. The deep neural network can also be designed to perform image classification. The system provides the unique property that the training performed within a straight fiber setup can be utilized for high fidelity reconstruction/classification of images that are transported through either straight or bent fiber making retraining for different bending situations unnecessary. In addition, high quality image transport and reconstruction is demonstrated for cells that are several millimeters away from the fiber input facet eliminating the need for additional optical elements at the distal end of the fiber. This novel imaging system shows great potential for practical applications in endoscopy including studies on freely behaving subjects.

Fiber imaging apparatus, methods, and applications

Fiber optic sensors based on multicore optical fibers that are intended for use in harsh environment sensing. This multicore fiber comprises an arrangement of optically coupled cores in a silica background. Sensors are fabricated by splicing a section of multicore fiber between two single mode fibers. This multicore fiber sensor is simple and repeatable to fabricate and multiple sensors can be multiplexed in a chain. These fiber optic sensors are intended for a broad set of sensing applications including temperature, pressure, strain, bending, acoustic vibrations, mechanical vibrations, or combinations thereof.

Multicore optical fiber apparatus, methods, and applications

Optical devices and a method for manufacturing these devices. One optical device includes a core region having a first medium of a first refractive index n, and includes a cladding region exterior to the core region. The cladding region includes a second medium having a second refractive index nhigher than the first refractive index n. The cladding region further includes a third medium having a third refractive index nlower than the first refractive index n. The third medium is dispersed in the second medium to form a plurality of microstructures in the cladding region. Another optical device includes a plurality of core regions including at least one core having a doped first medium, and includes a cladding region exterior to the plurality of core regions. The core regions and the cladding region include a phosphate glass.

Microstructured optical fibers and manufacturing methods thereof

A first optical fiber () having a first end and a second end is connected to a multimode second optical fiber () at the second end. The first optical fiber () outputs a substantially single mode optical beam at its second end. The multimode second optical fiber () converts light in the optical beam of single mode from the first optical fiber to light of multiple modes, and provides an output beam that has less diffractive spreading than that of a Gaussian beam.

Apparatus and method of generating nearly non-diffracting beams from multimode optical fibers

An optical device that includes 1) a gain section having a plurality of core regions including dopant species configured to absorb incident radiation at a first wavelength and emit radiation at a second wavelength, and 2) at least one passive section attached to the gain section. The gain section and the at least one passive section comprise an optical cavity which selectively promotes in-phase light emission from the optical cavity. An alternative optical device which includes a gain section having a plurality of core regions including dopant species configured to absorb incident radiation at a first wavelength and emit radiation at a second wavelength, and 2) two passive sections attached to the gain section at opposite ends. In this alternative optical device, the gain section and the two passive sections comprise an optical cavity which selectively promotes in-phase light emission from the optical cavity such that the light emission from the optical cavity, in a far field, has a singular Gaussian-like intensity distribution about a longitudinal axis extending from the optical cavity.

All-fiber mode selection technique for multicore fiber laser devices

An optical device includes an optical fiber having a core including multicomponent phosphate glasses, and a cladding surrounding the core, and a first fiber Bragg grating formed in a first portion of the core of the optical fiber and having an index modulation amplitude greater than 2&#xd7;10.

Growing community of inventors

Winter Park, FL, United States of America

Axel Schulzgen