Broadband red light generator for rgb display

A generator and display technology, applied in the direction of lasers, laser devices, phonon exciters, etc., can solve the problem of speckle noise reduction

Active Publication Date: 2017-05-24
IPG PHOTONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This alone would show that if the reference's yellow light source is used to illuminate the display, this light source is not effective for speckle noise reduction

Method used

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  • Broadband red light generator for rgb display
  • Broadband red light generator for rgb display
  • Broadband red light generator for rgb display

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Embodiment Construction

[0076] By way of introduction, embodiments of the present disclosure are directed to novel broad spectral line red light generators and methods for emitting high power, broad linewidth, single mode (SM) laser pulses in the 610-650 nanometer (nm) range. A broadline pulsed SM IR fiber laser source is configured to emit a pulse train that pumps an SM Raman fiber converter that induces an IR that produces Raman-shifted IR light in the 1220 to 1300 nm wavelength range. Efficient Raman conversion of energy. Broad spectral linewidths at desired wavelengths selected from the Raman-shifted wavelength range vary between 10 and 25 nm, with upper limits often even higher. Coupling of IR light at Raman-shifted wavelengths into a single-pass second-harmonic generator comprising a standard LBO nonlinear crystal generating a wavelength range of 610-650nm SM red pulse type light with a spectral line of about 5nm and wider.

[0077] The disclosed red light generator utilizes the unique struct...

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Abstract

A broad line red light generator is configured with a single mode (SM) pulsed ytterbium ('Yb') fiber laser pump source outputting pump light in a fundamental mode ('FM') at a pump wavelength which is selected from a 1030 - 1120 nm wavelength range. The disclosed generator further includes a SM fiber Raman converter spliced to an output of the Yb fiber laser pump source. The Raman converter induces an 'n' order frequency Stokes shift of the pump light to output the pump light at a Raman-shifted wavelength within 1220 and 1300 nm wavelength range with a broad spectral line of at least 10 nm. The disclosed light generator further has a single pass second harmonic generator ('SHG') with a lithium triborate ('LBO') nonlinear optical crystal having a spectral acceptance linewidth which is sufficient to cover the broad spectral line of the pump light. The SHG generates a SM pulsed broad-line red light with a broad spectral line of at least 4 nm.

Description

technical field [0001] The present disclosure relates to a broadband red light generator based on a wavelength conversion scheme comprising a combination of a fiber optic Raman converter and a second harmonic generator such as a lithium triborate nonlinear optical crystal (LBO), which The combination operates to produce red light with a broad spectral linewidth of at least about 5 nm (which can reduce speckle noise on laser-illuminated digital displays). Background technique [0002] Glossary [0003] As used in this disclosure, the terms listed below have the following respective meanings: [0004] Broad spectral lines or broadband refers to spectral lines extending beyond the wavelength range of 5-25 nm for red light and at least 10 nm for infrared radiation at the desired Raman-shifted wavelength. [0005] A continuous wave ("CW") laser refers to a laser that emits radiation continuously rather than in short pulses (as in pulsed lasers). [0006] Duty cycle is the prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20H01S3/23H04N9/31H04N13/04
CPCH01S3/0675H01S3/06758H01S3/1618H01S3/302G02F1/3532H01S3/08045H01S3/094046H01S3/2391H01S3/0092G02F1/37H01S3/005G02B27/48G02F1/3551
Inventor 曼纽尔·莱昂纳多伊格尔·山马尔特瑟夫阿列克谢·阿夫多欣格雷格里·基顿
Owner IPG PHOTONICS CORP
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