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Continuously variable filter for iodine lasers.

S Ariga¹, B Ahlborn

¹Department of Physics, The University of British Columbia, Vancouver, B. C., Canada.

The Review of Scientific Instruments

|March 1, 1978

Summary

This summary is machine-generated.

A novel water cell was created to control 1.315-microm radiation intensity. This variable attenuator accurately determined the linear range of a photoresistor for precise measurements.

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Area of Science:

Optics and Photonics
Materials Science
Radiation Physics

Background:

Accurate control of laser radiation intensity is crucial for optical experiments.
Existing attenuators may lack the dynamic range or tunability required for certain applications.
Photoresistors require calibration within their linear operating range for reliable photodetection.

Purpose of the Study:

To develop a water-based attenuator for 1.315-microm radiation.
To achieve a variable transmission with a wide dynamic range.
To utilize the attenuator for characterizing the linear range of a photoresistor.

Main Methods:

Construction of a water cell designed to absorb 1.315-microm radiation.
Implementation of a mechanism for adjusting the water path length or concentration to vary transmission.
Measurement of photoresistor response as a function of controlled radiation intensity.

Main Results:

The water cell demonstrated a variable transmission for 1.315-microm radiation.
A dynamic range of approximately 10^3 was achieved with the water cell attenuator.
The linear operating range of the photoresistor was successfully determined using the developed filter.

Conclusions:

A water cell is an effective and tunable attenuator for 1.315-microm radiation.
The developed attenuator provides a broad dynamic range suitable for precise optical measurements.
This method enables accurate characterization of photodetector linearity.