Compact Infrared Broadband Source Using Microchip Laser
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Solution Overview
Problem
Current technologies for generating broadband infrared sources are limited by size, weight, and complexity, particularly in the 2-14 μm range, and fail to effectively utilize microchip lasers and other high peak power pumps, often requiring additional amplification and cavity-based systems.
Innovation Solution
A compact broadband infrared source is achieved using a microchip laser coupled with a nonlinear optical element and a fiber-based wavelength transmitter, enabling wavelength conversion through optical parametric generation or amplification without a cavity, allowing for high power and high brightness emission within the 2-14 μm range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional broadband infrared sources are used, then sufficient power and bandwidth are achieved, but the system size and weight increase significantly
Solution Approach 1:
The patent combines multiple functions into a single integrated system: the microchip laser, nonlinear optical element, and fiber-based wavelength transmitter are merged into one compact broadband infrared source, eliminating the need for separate amplification systems and reducing overall weight while maintaining high power output
Solution Approach 2:
The invention changes the operating parameters by using a microchip laser with pulse widths below 5 ns and repetition rates from Hz to MHz, achieving high peak power in a compact form factor. The nonlinear optical element transforms these parameters to generate broadband emission from 2-14 μm without requiring additional amplification
2Power
If microchip lasers are used as pump sources, then compact size and high peak power are achieved, but additional amplification and cavity-based systems are required
Solution Approach 1:
The patent extracts and eliminates the unnecessary amplification and cavity-based components from the system. By directly coupling the microchip laser with the nonlinear optical element and fiber-based wavelength transmitter, the invention removes redundant elements while maintaining high peak power capability
Solution Approach 2:
The nonlinear optical element serves as an intermediary that directly transforms the microchip laser output into broadband infrared emission. This mediator enables efficient energy conversion without requiring additional amplification stages or complex cavity systems
3Adaptability or versatility
If broadband infrared generation is achieved through traditional methods, then sufficient bandwidth is obtained, but the system becomes bulky and complex
Solution Approach 1:
The patent creates a universal broadband infrared source that can operate across the 2-14 μm range by selecting appropriate pump wavelengths and nonlinear optical elements. This multi-functional design eliminates the need for multiple specialized systems, reducing overall complexity while maintaining broad spectral coverage
Solution Approach 2:
The invention introduces dynamic adjustability by allowing selection of different pump wavelengths and nonlinear optical elements to tune the output spectrum. This dynamic configuration enables the system to adapt to different application requirements without requiring multiple fixed systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a compact, scalable, and efficient broadband infrared source with reduced size and weight, suitable for applications like spectroscopy, LIDAR, and free space communications, with the ability to operate across the transparency range of the fiber by choosing appropriate pump and nonlinear elements.
Implementation Method 1
A compact broadband infrared source is achieved using a microchip laser coupled with a nonlinear optical element and a fiber-based wavelength transmitter, enabling wavelength conversion through optical parametric generation or amplification
Implementation Method 2
A compact broadband infrared source is achieved using a microchip laser coupled with a nonlinear optical element and a fiber-based wavelength transmitter, enabling wavelength conversion through optical parametric generation or amplification
Implementation Method 3
nonlinear optical element for shifting the pump wavelength to a longer wavelength
Implementation Method 4
An optical fiber comprises a core surrounded by one or more claddings. Light travels in the core and is confined by the index difference between the core and cladding.
Implementation Method 5
While supercontinuum generation is possible by focusing a high intensity light into a nonlinear medium
Data Source
AI summary
A device for the generation of supercontinuum in infrared fiber with a compact light source comprising a microchip laser is launched directly into an infrared fiber without a nonlinear element. Light from the laser is beyond the two-photon absorption of the infrared fiber. The broadband output has a bandwidth greater than the input laser bandwidth by at least 100% and an emission wavelength range from 2 to 14 micrometers.