CdSe QUANTUM DOTS DOPED OPTICAL FIBER AND A CURRENT SENSOR USING THE SAME

• US 20110037454A1
• Filed: 08/13/2009
• Published: 02/17/2011
• Est. Priority Date: 08/13/2009
• Status: Abandoned Application

• Current Assignee: Gwangju Institute of Science and Technology
• Original Assignee: Gwangju Institute of Science and Technology
• Inventors: Yang, Ho Young, Han, Won Taek, Watekar, Pramod R., Ju, Seong Mi
• Application Number:
  US12/540,412
• Publication Number:
  US 20110037454A1
• Time in Patent Office: Days
• US Class Current: 324/96
• CPC Class Codes: G01R 15/245 using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
• CPC Class Codes: G02B 6/02052 comprising optical elements other than gratings, e.g. filters comprising gratings G02B6/02057

Abstract

Disclosed is an optical fiber for a current sensor, the optical fiber comprising a core doped with CdSe quantum dots and a current sensor using the same.

Claims

1. An optical fiber for a current sensor, the optical fiber comprising a core doped with CdSe quantum dots.

2. The optical fiber of claim 1, wherein the CdSe quantum dots have about 5 nm of size in average.

3. The optical fiber of claim 1, wherein the core is an alumino-germano-silica glass.

4. A current sensor using a CdSe quantum dots doped optical fiber, the current sensor comprising:

a light source;

a linear polarizer coupled to the light source;

a collimator couple to the linear polarizer;

a optical fiber having a core doped with CdSe quantum dots, one end of which is coupled to the polarizer;

a drum made of insulator and having a hollow portion, on which the optical fiber is wounded with the optical fiber being twisted to have circular polarization in the optical fiber;

a polarimeter coupled to the other end of the optical fiber;

a photodetector connected to the polarimeter; and

a conductor inserted in the hollow portion of the drum and carrying a current.

5. The current sensor of claim 4, wherein the CdSe quantum dots have about 5 nm of size in average.

6. The current sensor of claim 4, wherein the core is an alumino-germano-silica glass.

7. The current sensor of claim 4, wherein the insulator is a plastic material.

8. The current sensor of claim 4, wherein the photodetector comprises a personal computer for analyzing and displaying the Faraday rotation angle using built-in software.