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Toroids

Toroids

A toroid is a closely wound donut-shaped coil constructed using a single conducting wire. In general, it is assumed that a toriod consists of multiple circular loops perpendicular to its axis.
When connected to a supply, the magnetic field generated in the toroid has field lines circular and concentric to its axis. Conventionally, the direction of this magnetic field is expressed using the right-hand rule. If the fingers of the right hand curl in the current direction, the thumb points in...

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Implementation of the toroidal absorption cell with multi-layer patterns by a single ring surface.

Hong Chang, Shiling Feng, Xuanbing Qiu

|November 2, 2020

Summary

This summary is machine-generated.

We designed a novel toroidal multi-pass cell using multi-layer patterns to significantly extend optical path length. This advancement efficiently utilizes space, enabling longer path lengths in compact designs.

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Area of Science:

Optical Engineering
Spectroscopy
Laser Technology

Background:

Toroidal multi-pass cells are crucial for enhancing light-matter interaction.
Existing designs face limitations in effective path length and space utilization.

Purpose of the Study:

To develop an advanced toroidal multi-pass cell with multi-layer patterns.
To enhance the effective optical path length and volume efficiency.

Main Methods:

Utilized an off-axis model for toroidal multi-pass cell design.
Derived analytical equations based on vector calculations.
Performed numerical ray tracing simulations.

Main Results:

Achieved extended optical path lengths compared to single-layer patterns.
Demonstrated practical path lengths of 8.3 m (2-layer) and 10 m (3-layer).
Maximized theoretical path length of 30 m with a 5 cm column radius.
Reduced fringe effects to <0.5% using a designed mask.

Conclusions:

The multi-layer toroidal multi-pass cell design offers superior optical path length and volume efficiency.
The design is practical, fabricable, and reduces optical aberrations.
This technology has potential applications in various spectroscopic and laser systems.