Paul Hoang Trinh

US Patent:

20020149780, Oct 17, 2002

Filed:

Mar 7, 2002

Appl. No.:

10/093884

Inventors:

Paul Trinh - Tustin CA, US

International Classification:

G01B009/02

US Classification:

356/477000

Abstract:

A device for measuring wavelength of an electromagnetic signal has first and second waveguides configured such that a portion of an electromagnetic signal transmitted through the first waveguide is separated from the remaining portion of the electromagnetic signal and is communicated to the second waveguide and is subsequently at least partially recombined with the remaining electromagnetic signal in the first waveguide after traveling a distance which is different from a distance traveled by the remaining electromagnetic signal in the first waveguide. A first sensor is configured to measure the power of the electromagnetic signal in the first waveguide after at least a portion of the separated electromagnetic signal in the first waveguide has been recombined with the remaining electromagnetic signal in the first waveguide. A second sensor is configured to measure the power of the electromagnetic signal in the second waveguide after at least a portion of the separated electromagnetic signal in the second waveguide has been recombined with the remaining electromagnetic signal in the first waveguide. The first and second waveguides are formed upon and integrally with a common semiconductor substrate.

US Patent:

20180003560, Jan 4, 2018

Filed:

Jun 7, 2017

Appl. No.:

15/616865

Inventors:

MohammadHossein Asghari - Los Angeles CA, US
Bahram Jalali - Los Angeles CA, US
Paul Trinh - Lake Forest CA, US

Assignee:

The Regents of the University of California - Oakland CA
Time Photonics, Inc. - Irvine CA

International Classification:

G01J 3/28
G01B 9/02

Abstract:

Methods and apparatus for multi-probe photonic time-stretch spectral measurements are described. Methods allow for capturing real-time and single-shot non-overlapping spectral bands from multiple probes simultaneously, using Time-Stretch Dispersive Fourier Transform (TS-DFT) systems combined with Wavelength Division Multiplexing (WDM) device.