Related Experiment Video
Updated: Jun 28, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
Real-time optical spectrum analysis of a light source using a polarimeter.
X Steve Yao1, Bo Zhang, Xiaojun Chen
1Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Polarization Research Center, Tianjin University, Tianjin, China. syao@generalphotonics.com
This study reveals that a polarimeter can perform optical spectrum analysis, offering superior speed and resolution compared to traditional methods. A novel polarimeter-based optical spectrum analyzer (P-OSA) achieves high-speed spectral measurements.
Area of Science:
- Optics and Photonics
- Spectroscopy
- Polarimetry
Background:
- Optical spectrum analysis and polarization analysis are typically considered distinct fields.
- Conventional spectrum analysis methods face limitations in speed and resolution for certain applications.
Purpose of the Study:
- To demonstrate that optical spectrum analysis can be achieved using a polarimeter.
- To introduce a novel polarimeter-based optical spectrum analyzer (P-OSA) for high-speed and high-resolution measurements.
- To enable rapid spectral characterization of dynamic light sources.
Main Methods:
- Development and experimental demonstration of a novel polarimeter-based optical spectrum analyzer (P-OSA).
- Utilizing polarimetric principles for spectral measurement.
- Characterizing swept laser sources at high repetition rates.
Main Results:
- The P-OSA achieves spectral resolution and speed unattainable by traditional methods.
- Demonstrated rapid measurement of swept laser sources at repetition rates exceeding 100 kHz.
- Generated unique 3-D spectral shape plots of light sources during wavelength sweeps.
Conclusions:
- Polarimetry offers a viable and advantageous alternative for optical spectrum analysis.
- The P-OSA provides a high-speed, high-resolution platform for characterizing dynamic optical signals.
- This technique opens new possibilities for real-time spectral analysis and visualization.
Related Concept Videos
Measuring Reaction Rates
UV–Vis Spectrometers
Raman Spectroscopy Instrumentation: Overview
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
Polar Coordinates: Problem Solving
Spectrophotometry: Introduction
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
IR Spectrometers

