Related Experiment Video
Updated: May 27, 2026
09:01
High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
Published on: April 16, 2017
Thermal performance in high power SHG characterized by phase-matched calorimetry
Hwan Hong Lim1, Toshio Katagai, Sunao Kurimura
1National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba-shi, Ibaraki 305-0044, Japan.
Optics Express
|November 24, 2011
Summary
We developed phase-matched calorimetry (PMC) to assess heat removal in second-harmonic generation (SHG) devices. Improved thermal management using metal housing and reduced aperture enabled higher power output without saturation.
Area of Science:
- Optics and Photonics
- Materials Science
- Thermal Engineering
Background:
- Efficient heat removal is critical for high-power nonlinear optical devices.
- Characterizing thermal performance of second-harmonic generation (SHG) modules is essential for device optimization.
Purpose of the Study:
- To propose a novel method, phase-matched calorimetry (PMC), for quantifying heat removal in SHG devices.
- To investigate the impact of thermal management strategies on SHG device performance.
Main Methods:
- Developed and applied phase-matched calorimetry (PMC) to analyze temperature changes relative to SHG power.
- Implemented a combination of metal housing and reduced crystal aperture for enhanced thermal disposal.
- Utilized a 10-mm-long periodically poled magnesium-substituted lithium niobate (PPMgSLT) crystal.
Main Results:
- Demonstrated a 19 W single-pass 532-nm SHG output.
- Achieved a conversion efficiency of 26.5% without saturation.
- Showcased improved thermal disposal performance through optimized device design.
Conclusions:
- Phase-matched calorimetry (PMC) provides an effective means to characterize SHG module heat removal.
- Optimized thermal management strategies significantly enhance SHG device power and efficiency.
- The developed method and device configuration pave the way for higher-performance optical systems.
Related Concept Videos
01:19Calorimetry
When objects at different temperatures are placed in contact with each other but isolated from everything else, they attain thermal equilibrium. A container that prevents heat transfer in or out is called a calorimeter, and the use of a calorimeter to make measurements is called calorimetry. Generally, these measurements involve heat or specific heat capacity. The term "calorimetry problem" is used for any problem where the specified objects are thermally isolated from their surroundings. An...
01:16Specific Heat
The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or 4186 J/kg/K.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or 4186 J/kg/K.
03:02Constant Pressure Calorimetry
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
02:41Constant Volume Calorimetry
Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
01:20Mechanisms of Heat Transfer II
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
02:46Quantifying Heat
Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the atoms and...