Measuring optical array polarity, power, and loss using a position sensing detector and photodetector-equipped optical testing device

Patent metadata

Field	Value
Publication number	US-10481041-B2
Application number	US-201715603087-A
Country	US
Kind code	B2
Filing date	May 23, 2017
Priority date	May 23, 2017
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

An optical testing device is provided. The testing device includes a position sensing detector (PSD) having an optical sensing area that is optically responsive to a first range of wavelengths. The PSD receives a plurality of optical signals having wavelengths within the first range and emitted through a respective plurality of optical fibers and detects a plurality of positions where the optical signals impinged on the optical sensing area for determining array polarity. The PSD receives a plurality of first optical signals having wavelengths within the first range and detects the polarity and a plurality of optical intensities of the first optical signals. The testing device includes a photodetector that is optically responsive to a second range of wavelengths different than the first range. The photodetector receives a plurality of second optical signals within the second range and detects a plurality of optical intensities of the second optical signals.

First claim

What is claimed is:

1. An optical testing device, comprising:
a position sensing detector having an optical sensing area that consists of a single integrated substrate having a first material that is photosensitive to a first range of wavelengths, the position sensing detector being configured to:
receive a plurality of first optical signals emitted through a respective plurality of optical fibers of an optical fiber cable, the plurality of first optical signals having wavelengths within the first range of wavelengths;
detect a plurality of positions on the single integrated substrate where the plurality of first optical signals respectively impinge on the single integrated substrate;
detect a plurality of first optical intensities of the plurality of first optical signals, respectively; and
output data representative of the plurality of positions and the plurality of first optical intensities; and

a photodetector of a second material that is different than the first material and is photosensitive to a second range of wavelengths different than the first range of wavelengths, the photodetector being configured to:
receive a plurality of second optical signals emitted through the plurality of optical fibers of the optical fiber cable, respectively, the plurality of second optical signals having wavelengths within the second range of wavelengths.

2. The optical testing device of claim 1 , wherein the photodetector is configured to:
detect a plurality of second optical intensities of the plurality of second optical signals, respectively; and
output data representative of the plurality of second optical intensities.

3. The optical testing device of claim 2 , further comprising:
a processor configured to:
receive the data representative of the plurality of positions, the data representative of the plurality of first optical intensities, and the data representative of the plurality of second optical intensities;
determine a polarity of the optical fiber cable based on the data representative of the plurality of positions;
determine an optical loss of at least one first optical signal based on a first optical intensity of the plurality of first optical intensities;
determine an optical loss of at least one second optical signal based on a second optical intensity of the plurality of second optical intensities; and
output the determined polarity of the optical fiber cable, the optical loss of the at least one first optical signal, and the optical loss of the at least one second optical signal.

4. The optical testing device of claim 3 , wherein the processor configured to:
receive information indicating an order in which the plurality of first optical signals were received by the position sensing detector; and
determine the polarity of the optical fiber cable based on: the information indicating the order in which the plurality of first optical signals were received, information indicating an order in which the plurality of first optical signals were emitted through the plurality of optical fibers, and the data representative of the plurality of positions.

5. The optical testing device of claim 3 , wherein the position sensing detector is configured to detect a respective plurality of signatures of the plurality of first optical signals and output data representative of the respective plurality of signatures, and wherein the processor configured to:
receive the data representative of the respective plurality of signatures;
determine a plurality of transmitting positions of the plurality of first optical signals based on the data representative of the respective plurality of signatures;
determine the polarity of the optical fiber cable based on: the plurality of transmitting positions, and the data representative of the plurality of positions on the single integrated substrate where the plurality of first optical signals respectively impinge on the single integrated substrate.

6. The optical testing device of claim 1 , wherein the position sensing detector and the photodetector are stacked such that at least a portion of the position sensing detector overlaps with the photodetector at least a portion of a sensory field of the photodetector.

7. The optical testing device of claim 6 , wherein the position sensing detector is configured to pass light having wavelengths outside of the first range of wavelengths and wherein the wavelength of the plurality of second optical signals is outside the first range of wavelengths and the photodetector is configured to receive the plurality of second optical signals after the plurality of second optical signals pass through the position sensing detector.

8. The optical testing device of claim 1 , wherein the position sensing detector is positioned in the optical testing device such that the position sensing detector does not cover any portion of a sensory field of the photodetector.

9. The optical testing device of claim 8 , further comprising:
a wavelength-selective optical splitter positioned to receive the plurality of first optical signals and the plurality of second optical signals and configured to:
selectively output the plurality of first optical signals having wavelengths within the first range of wavelengths to the position sensing detector; and
selectively output the plurality of second optical signals having a wavelength within the second range of wavelengths to the photodetector.

10. The optical testing device of claim 1 , wherein the first material is silicon and the second material is germanium or indium gallium arsenide.

11. The optical testing device of claim 1 , wherein the first range of wavelengths is 350 to 1000 nm and the second range of wavelengths is 700 to 1600 nm.

12. The optical testing device of claim 1 , wherein the plurality of optical fibers are singlemode optical fibers or multimode optical fibers.

13. The optical testing device of claim 1 , wherein the position sensing detector and the photodetector are stacked with a bonding agent therebetween.

14. The optical testing device of claim 1 , wherein the position sensing detector is coated with a reflective coating configured to pass light having wavelengths within the first range of wavelengths and reflect light having wavelengths outside of the first range of wavelengths and within the second range of wavelengths.

15. The optical testing device of claim 14 , wherein the photodetector is positioned to receive the light reflected by the reflective coating.

16. An optical testing device, comprising:
a position sensing detector having an optical sensing area that consists of a single integrated substrate having a first material that is photosensitive to a first range of wavelengths, the position sensing detector being configured to:
receive a plurality of first optical signals emitted through a respective plurality of optical fibers of an optical fiber cable, the plurality of first optical signals having wavelengths within the first range of wavelengths;
detect a plurality of positions on the single integrated substrate where the plurality of first optical signals respectively impinged on the single integrated substrate; and
output data representative of the plurality of positions; and

a photodetector of a second material that is different than the first material and is photosensitive to a second range of wavelengths different than the first range of wavelengths, the photodetector being configured to:
receive a plurality of second optical signals emitted through the plurality of optical fibers of the optical fiber cable, respectively, the plurality of second

Assignees

• Fluke Corp

Inventors

• Schell J David
• Goldstein Seymour
• Kassler Harlan L
• Salling Jackson L

Classifications

• G01M11/333

  using modulated input signals · CPC title

• G01M11/30

  Testing of optical devices, constituted by fibre optics or optical waveguides · CPC title

• G01J1/00

  Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 {; exposure meters built in cameras G03B17/06}) · CPC title

• G01J1/10

  by comparison with reference light or electric value {provisionally void} · CPC title

• G01M11/02 Primary

  Testing optical properties · CPC title