Axel Schulzgen

US Patent:

8102885, Jan 24, 2012

Filed:

May 8, 2008

Appl. No.:

12/117532

Inventors:

Nasser Peyghambarian - Tucson AZ, US
Axel Schulzgen - Tucson AZ, US
Li Ll - Tucson AZ, US

Assignee:

The Arizona Board of Regents on Behalf of the University of Arizona - Tucson AZ

International Classification:

H01S 3/30
H01S 3/08

US Classification:

372 6

Abstract:

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.

US Patent:

20080130692, Jun 5, 2008

Filed:

Sep 26, 2007

Appl. No.:

11/861923

Inventors:

Axel Schulzgen - Tucson AZ, US
Jacques Albert - Gatineau, CA
Nasser Peyghambarian - Tucson AZ, US
Seppo Honkanen - Tucson AZ, US
Li Li - Tucson AZ, US

Assignee:

THE AZ. BRD. OF REGENTS ON BEHALF OF THE U. OF AZ. - Tucson AZ

International Classification:

H01S 3/30
G02B 6/124
G02B 6/00

US Classification:

372 6, 65394, 385 37

Abstract:

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 2×10.

US Patent:

20090201953, Aug 13, 2009

Filed:

May 3, 2006

Appl. No.:

11/913417

Inventors:

Nasser Peyghambarian - Tucson AZ, US
Axel Schulzgen - Tucson AZ, US
Valery Temyanko - Tucson AZ, US

Assignee:

THE ARIZONA BD OF REG ON BEHALF OF THE UNIVERSITY AZ - Tucson

International Classification:

H01S 3/30
C03B 37/02
G02B 6/02

US Classification:

372 6, 65435, 385123

Abstract:

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 n higher than the first refractive index n. The cladding region further includes a third medium having a third refractive index n lower 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.

US Patent:

20110235166, Sep 29, 2011

Filed:

Oct 14, 2009

Appl. No.:

13/124582

Inventors:

Xiushan Zhu - Tucson AZ, US
Axel Schulzgen - Winter Park FL, US
Nasser Peyghambarian - Tucson AZ, US

Assignee:

The Arizona Board of Regents on Behalf of the Univerity of Arizona - Tucson AZ

International Classification:

H01S 3/067
H01S 3/091
G02B 6/26

US Classification:

3593413, 3593411, 385 28

Abstract:

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.

US Patent:

20200394791, Dec 17, 2020

Filed:

Jun 10, 2020

Appl. No.:

16/898182

Inventors:

- Orlando FL, US
Yangyang Sun - Orlando FL, US
Jian Zhao - Orlando FL, US
Axel Schulzgen - Winter Park FL, US

International Classification:

G06T 7/00
G02B 6/42
G06N 3/04
G06T 5/00

Abstract:

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.

US Patent:

20170167899, Jun 15, 2017

Filed:

Feb 4, 2015

Appl. No.:

15/117820

Inventors:

- Orlando FL, US
Axel Schulzgen - Winter Park FL, US
Jose Enrique Antonio Lopez - Orlando FL, US

Assignee:

UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC. - Orlando FL

International Classification:

G01D 5/353
G01K 11/32

Abstract:

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.