Technical Notes

Technical Notes

Fiber Optic Coupling

The problem of coupling light into an optical fiber is really two separate problems. In one case, we have the problem of coupling into multimode fibers, where the ray optics of the …

Technical Notes

Optics Formulas

Light is a transverse electromagnetic wave. The electric E and magnetic M fields are perpendicular to each other and to the propagation vector k, as shown below. Power density is given …

Technical Notes

How to Clean Optics

Dust and stains on Optics can cause scattering, and impurities on the optic surface can react with incident laser light to damage optical coatings. With proper handling and cleaning …

Technical Notes

Linear Translation Stage Terminology

This glossary covers important terms related to linear translation stages.

Technical Notes

Motion Basics Terminology & Standards

The function of a stage is to constrain motion to a desired direction. For a linear stage, the desired motion is along an ideal straight line. Any motion in a constrained direction …

Technical Notes

Laser Damage Threshold

For continuous wave (CW) lasers the damage threshold can be calculated from the peak power and beam diameter. For example, to calculate the power density of a 50 mW Nd:YAG laser at …

Technical Notes

Stage Components Considerations

Choosing the right positioning technology for an application is a complex task. There are numerous choices of linear stages, rotation stages and actuators and each product has its own …

Technical Notes

Optical Detector Definitions of Characteristics

This glossary covers important terms relating to our New Focus photodetectors and photoreceivers.

Technical Notes

Linear Translation Stage Technology Guide

Each material used in the design of a linear translation stage has its own unique set of advantages and disadvantages. The following is a summary of the properties for the most common …

Technical Notes

Optical Mirror Mount Technology Guide

An Optical Mirror Mount is a device used in optics research that securely holds a mirror in place while allowing for precision tip and tilt adjustment. Due to the sensitive nature of …

Technical Notes

Control Theory Terminology

Common motion systems use three types of control methods. They are position control, velocity control and torque control. The majority of Newport’s motion systems use position control. …

Technical Notes

Building your Intelligent Picomotor™ Driver Network

The Intelligent Picomotor control modules include the Model 8742 Open loop controller/driver and the Model 8743-CL closed-loop controller/driver. The Model 8742 can control up to four …

Technical Notes

Advantages of New Focus Mirror Mounts - Technical Note

When we design our mirror mounts, we strive to make mounts that provide precision adjustments that really stay put. To give you the ultimate in precision, one of our design criteria …

Technical Notes

Picomotor Definitions of Characteristics

The smallest rotation you can make with the Picomotor™ actuator. This is the typical rotation caused by applying a single voltage pulse to the Picomotor actuator. Since the Picomotor …

Technical Notes

Thermal Performance of Mirror Mounts

Whether you are a laboratory researcher or an optical-equipment manufacturer, you’ll be concerned with how temperature changes affect your optical system. A stable mount will lead to …

Technical Notes

New Focus Tunable Lasers

The laser cavities in our external-cavity diode laser (ECDL) systems and laser modules are the result of many years of experience in designing and manufacturing tunable lasers. Their …

Technical Notes

Stability of Optical Posts vs. Pedestals

The way you mount your optics can make the difference between a stable setup and one that suffers from vibrations. When building a setup, be sure to minimize beam height, use fewer …

Technical Notes

Building a Swept-Wavelength System

A swept-wavelength system is similar to the traditional step-and-measure system in that you’ll need a tunable laser source, the device you want to test, some photoreceivers or power …

Technical Notes

New Focus Tunable Laser Linewidth

The Root-Allan variance, like the heterodyne linewidth, is a measure of the frequency stability of an oscillator. It can be interpreted as the laser spectral content over a given time …

Technical Notes

Maximizing the Lifetime of Your Picomotor™ Actuators

In order to achieve consistent performance and maximize the lifetime of your Picomotor™ actuators, keep the following precautions in mind: Do not remove the knob or the screw from …

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