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Double-barreled and Concentric Microelectrodes for Measurement of Extracellular Ion Signals in Brain Tissue

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Compact in-line autocorrelator using double wedge.

Jungkwuen An¹, Dong Eon Kim

¹Center for Attosecond Science and Technology, Department of Physics, Pohang University of Science and Technology, Pohang, 790-784, South Korea.

|February 15, 2012

Summary

This summary is machine-generated.

A novel double wedge optical design offers a compact, in-line autocorrelator. This new design enables precise measurement of ultrashort laser pulses, outperforming conventional methods.

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Area of Science:

Optics and Photonics
Ultrafast Laser Technology
Optical Instrumentation

Background:

Conventional autocorrelators, often based on Michelson interferometers, split beams at a 90-degree angle.
This configuration can lead to bulky and complex setups, limiting their practical applications.
There is a need for more compact and efficient optical designs for measuring ultrashort laser pulses.

Purpose of the Study:

To propose and experimentally demonstrate a new optical design for an autocorrelator utilizing a double wedge.
To achieve a compact, in-line layout for autocorrelator systems.
To evaluate the performance of the double wedge autocorrelator for ultrashort laser pulse measurement.

Main Methods:

A double wedge optical design was conceived, featuring two wedges in a mirror-image configuration.
The design allows for beam splitting at a 180-degree angle with near-normal incidence.
Time delay is adjusted by altering the separation between the wedges, and performance is validated using 28 fs laser pulses.

Main Results:

The double wedge design facilitates a compact, in-line autocorrelator setup.
Adjustable time delay is achieved by scanning the wedge separation.
Multiple reflections generated by the wedges are angularly separated, simplifying analysis.

Conclusions:

The proposed double wedge autocorrelator is a viable and compact alternative to conventional designs.
It effectively measures ultrashort laser pulses, demonstrating its practical utility.
Further investigation into material dispersion and angular chirp effects is crucial for optimizing shorter pulse measurements.