An Er:Yb codoped fiber amplifier chain for the generation of pulses for coherent lidar applications at a wavelength near 1.5 microm is reported. The final 1.8-m-long power amplification stage had a 50-microm core diameter and yielded a 23-dB energy gain, resulting in 0.29-mJ, 100-ns pulses at a repetition rate of 4 kHz with no Brillouin scattering and an M2 of 2.1.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/ol.29.002590 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Interferometric LiDAR is a device that is used to achieve distance, velocity and phase estimation with high precision and resolution through the use of frequency-modulated continuous wave (FMCW). In this instance, we study quantum enhancement detection techniques for a Mach-Zender interferometer with a FMCW coherent state input. Various quantum detection methods-including NOON state detection, coincidence detection, and sum of parity detection-are applied to the FMCW coherent state and compared against the classical heterodyne detection technique.
View Article and Find Full Text PDFAdvancements in remote sensing and autonomous vehicle technologies made lidars equally important for unmanned objects alongside cameras. Therefore, precise 3D lidar imaging and point cloud generation have become important subjects. Although existing coherent lidar technologies provide precise imaging results, the spectral linewidth of the laser sources becomes a key limitation over long distances as it defines the maximum detection range.
View Article and Find Full Text PDFThe linear frequency swept light source is a critical device for several sensing applications, including FMCW LiDAR, with which the maximum sensing distance is determined by the coherence length of the light source and the spatial resolution is limited by the frequency scan nonlinearity. Here, we report what we believe to be a novel approach to generate highly coherent optical linear frequency sweeps (LFS) with a Fourier domain mode-locked (FDML) opto-electronic oscillator (OEO) deploying carrier suppressed single sideband (CS-SSB) modulation enabled by a dual-parallel Mach-Zehnder modulator (DP-MZM), with the coherence length determined by the fixed frequency laser used in the OEO, without the need of an expensive high-speed arbitrary waveform generator (AWG). Concurrently, a radio frequency (RF) LFS synchronized with the optical LFS is also generated with the FDML OEO.
View Article and Find Full Text PDFArticle Synopsis
- * The system simplifies signal processing by using the same chirped waveform for both transmission and local oscillation, allowing the receiver's bandwidth to be lower than the signal's chirping bandwidth.
- * This setup enables the simultaneous detection of a target's range and velocity, and experimental results show the capability for multi-target detection as well.
Article Synopsis
- - A new dual-wavelength lidar system, called Wind Flux 3000, can independently monitor particulate matter (PM) transport flux and wind conditions, combining both aerosol and wind measurements effectively.
- - The system provides key data including the particulate extinction coefficient, wind speed, direction, and other atmospheric parameters, which helps in understanding the relationship between PM concentration and environmental factors.
- - Utilizing advanced ensemble learning techniques, the study developed models that outperformed traditional methods in predicting PM concentration, achieving strong correlations and reduced errors in test predictions.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!