THORLABS Redstone OSA305 User Manual

THORLABS Redstone OSA305

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Redstone™ OSA305

Optical Spectrum

Analyzer

User Guide

Table of Contents

Other manuals for THORLABS Redstone OSA305

Quick Start Guide16 pages

Questions and Answers:

E
Erika OwenAug 7, 2025
Why THORLABS Redstone OSA305 software cannot find any instrument?
- S
  Steven ReedAug 7, 2025
  If the THORLABS Measuring Instruments software, ThorSpectra, doesn't detect the instrument, it might be because the instrument was connected after the software started. To resolve this, click the “Connect Devices” button in the Instrument menu to search for connected instruments. Also, verify that Windows® has detected the instrument in the “Device manager” under the Windows® Control panel, looking under “Thorlabs devices” (you may need to select “Show hidden devices”). If Windows® hasn’t detected it, ensure the instrument is on and connected to the PC with a USB cable that supports high-speed USB 3.0 (or USB 2.0 for OSA20xC models). If still not found, check the USB cable connection or reboot the instrument.
E
Eric ZimmermanAug 13, 2025
What to do if the screen doesn’t update during measurement with THORLABS Redstone OSA305 Measuring Instruments?
- H
  hartbradleyAug 13, 2025
  If the screen isn’t updating during measurement with THORLABS Measuring Instruments, first check your settings to ensure at least one trace is set to “Write” or “Average.” Look at the green progress bar in the bottom left corner to see if the device is still acquiring or processing data. Also, check the acquisition interval in the Settings dialog under the “Acquisition” tab; it should not be set to zero milliseconds. If the interferogram is saturated or non-linear, data display will be paused, and a new acquisition will be requested automatically. Open the Signal window from the Instrument menu and set the gain to Automatic so the Autogain algorithm can optimize settings.
N
Natasha MillerAug 21, 2025
How to unlock axis on THORLABS Measuring Instruments?
- L
  Lisa JoyceAug 21, 2025
  If you can't change the vertical or horizontal axis of the data display on your THORLABS Measuring Instruments, the “Lock axis” check box may be checked. Simply uncheck the “Lock axis” check box and click “Ok.”
J
Jacob TaylorAug 28, 2025
How to fix software installation failed for THORLABS Redstone OSA305?
- R
  Rebecca HallAug 28, 2025
  To resolve a failed software installation for THORLABS Measuring Instruments, ensure you have administrative rights on your computer. These rights are necessary to install the software. If you do not have them, ask your system administrator to grant you these rights or to perform the installation for you.

THORLABS Redstone OSA305 Specifications

General

Brand	THORLABS
Model	Redstone OSA305
Category	Measuring Instruments
Language	English

Summary

Warning Symbol Definitions

Safety

Warranty

Description

Introduction

General overview of the OSA's capabilities and intended use.

Interferometer Design

Explains the Michelson interferometer design used in the OSA.

Interferogram Data Acquisition

Details the process of collecting interferogram data using the instrument.

Interferogram Data Processing

Describes how interferogram data is processed by the OSA software.

Wavelength Meter Mode

Explains the OSA's functionality as a wavelength meter.

Wavelength Calibration and Accuracy

Details wavelength calibration methods and accuracy specifications.

Resolution and Sensitivity

Explains resolution and sensitivity settings and their impact.

Dynamic Range/Optical Rejection Ratio

Covers dynamic range and optical rejection ratio specifications.

Absolute Power and Power Density

Describes display options for power and power density.

Apodization

Explains apodization functions for improving spectrum quality.

Zero Fill

Details zero-filling for interpolating spectrum data.

Software

Overview of the OSA software package and its features.

Trigger

Explains external triggering options for measurements.

Interlock

Describes the laser safety interlock feature.

Using the Free-Space Input

Table Mounting when Using the Free-Space Input

Guidance on securing the OSA for free-space input use.

Activation of Alignment beam

How to activate the alignment laser beam for setup.

Free-Space Beam Alignment Example

Step-by-step example for aligning free-space beams.

Pure Air

Software Setup

Requirements

Minimum and recommended hardware/software specifications.

Software Installation

Instructions for installing the OSA software.

Connecting to the PC

Steps for connecting the OSA to a PC.

Starting the Application

How to launch and start the OSA application.

Operation

Interface Overview

Description of the main window layout and its components.

Spectrum View and Interferogram View

Explains the two primary display views.

Customizing the Display

Options for customizing display settings.

Acquiring Data

Procedures for acquiring spectral and interferogram data.

Movable Markers

Using movable markers for data inspection.

Fixed Markers

How to add and manage fixed markers.

Working with Data in Traces

Managing traces, including update options and math operations.

Saving and Loading Data

Options for saving and loading spectral data files.

Analyzing Data

Overview of analysis tools and their usage.

References

Using reference databases for spectral analysis.

Keyboard shortcuts

List of useful keyboard shortcuts for operation.

Settings

Basic Settings

Basic configuration options for the OSA.

Advanced Settings

Advanced instrument and processing settings.

Saving and Loading Settings

How to save and load configuration settings.

Virtual Instruments

LabVIEW® Drivers

Troubleshooting

Technical data

Mechanical Drawings

Certifications and compliances

Appendix

Calculating Absorption Cross Sections

Details on calculating absorption cross sections from references.

Apodization Functions

Lists and defines implemented apodization functions.

Regulatory

Thorlabs Worldwide Contacts

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