Pulsed-Light Optical Spectrum Analyzer Sweeps with Overlap Timing
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Solution Overview
Problem
Existing optical spectrum analyzers face a trade-off between measurement time and waveform quality when measuring pulsed light, as they struggle to balance the number of sweeps required to ensure accurate data acquisition with the duration of the measurement process.
Innovation Solution
The method involves setting an overlap width of wavelengths for each sweep and adjusting the delay time based on the overlap width, allowing for the synthesis of optical spectra from multiple sweeps while ensuring data quality and reducing measurement time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sweeps are performed to ensure accurate data acquisition, then measurement precision is improved, but measurement time increases
Solution Approach 1:
The measurement process is divided into multiple sweeps, where each sweep measures a portion of the optical spectrum. By segmenting the wavelength range into multiple measurement segments and combining them, the system achieves complete spectral coverage with optimized timing for each segment.
Solution Approach 2:
The system performs periodic sweeps at optimized intervals, using a gate signal synchronized with the pulsed light to trigger measurements. The periodic action is optimized by calculating specific delay times and overlap widths to ensure data completeness while minimizing redundant measurements.
2Measurement precision
If the number of sweeps is increased to eliminate data deficiencies, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary calculations to determine the optimal number of sweeps, delay times, and overlap widths before actual measurement. This preliminary planning stage computes the parameters needed to eliminate data deficiencies, avoiding the need for complex real-time adjustments during measurement.
Solution Approach 2:
The system uses feedback from the measured waveforms to identify data deficiencies and automatically adjusts measurement parameters. By analyzing the synthesized optical spectrum waveform, the system determines whether additional sweeps are needed and optimizes the measurement process accordingly.
Data Source
AI summary
A pulsed light measurement method for measuring an optical spectrum of pulsed light includes setting an overlap width of wavelengths at which light intensity is measured in each sweep among a plurality of sweeps performed in a measurement wavelength range of the optical spectrum, starting each sweep among the plurality of sweeps after a delay time, determined based on the overlap width, elapses after detection of a trigger of a gate signal synchronized with the pulsed light, and synthesizing and displaying the optical spectrum from a plurality of waveforms obtained by performing the plurality of sweeps.