Journal ArticleDOI
Automatic Calibration System for a Laser Power Meter
TLDR
In this paper, a microprocessor-based calibration system for a CW laser power meter has been developed, which consists of an isothermal calorimeter with a thermopile unit, an electrical, and an optical subsystem.Abstract:
A microprocessor-based calibration system for a CW laser power meter has been developed. The system consists of an isothermal calorimeter with a thermopile unit, an electrical, and an optical subsystem. Temperature control of the thermopile unit is achieved through a digital technique. The calibration of a power meter is performed using the effective efficiency of the unit as measured by a calorimeter. From error analyses, an overall accuracy has been obtained as ±1 percent in root mean square for a power level of 1 ~ 200 mW.read more
Citations
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Journal ArticleDOI
Highly sensitive calorimeter for microwatt-level laser power measurements
TL;DR: In this article, a sensitive calorimeter using an isothermal temperature control technique was developed for an accurate measurement of microwatt-level laser power in the visible and infrared spectral region.
Journal ArticleDOI
Calorimetric measurement of absolute terahertz power at the sub-microwatt level.
TL;DR: A calorimeter based on a DC substitution method using an isothermal temperature-control technique for determining absolute terahertz power is developed and is expected to demonstrate the traceability of THz power at a submicrowatt level.
Journal ArticleDOI
A PC-based adaptive software for automatic calibration of power transducers
Chern-Lin Chen,Shun-Chung Wang +1 more
TL;DR: This paper presents the design and implementation of an adaptive PC-based software on a computer-aided automatic calibration system built for the Instrumentation and Calibration Department, Taiwan Power Company, to calibrate power transducers regularly.
Journal ArticleDOI
Calorimeter with compensative absorber for measuring microwatt level optical power
Journal ArticleDOI
A double calorimeter for 10-W level laser power measurements
Makoto Endo,T. Inoue +1 more
TL;DR: In this paper, a double configuration consisting of an absorbing unit made of a disk absorber and an isothermal type calorimeter was fabricated for precise measurement of 10-W level laser power.
References
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Journal ArticleDOI
Calorimetric measurements of laser energy and power
TL;DR: The use of calorimeters for measuring laser output energies and powers is broadly reviewed as mentioned in this paper, including disc, cone, hollow-sphere, bolometer, volume absorption, and partial absorption types.
Journal ArticleDOI
A Laser Microcalorimeter
TL;DR: In this article, a double-calorimeter was developed at the Electrotechnical Laboratory for the measurement of the CW power of the gas laser (He-Ne) with high stability (± 0.05 percent).
Journal ArticleDOI
Advanced Control Method for Calorimetric Power Measurement
Takemi Inoue,Kyohei Yamamura +1 more
TL;DR: In this article, an advanced temperature control system has been developed for calorimetric method of electromagnetic wave power measurement, which can be reduced by repeatedly substituting the controlled variable through a DA converter and an adder.