1.645 µm Er:YAG single-mode dual-wavelength emitter for CH differential absorption lidar.

We present a hybrid fiber/bulk laser source at 1.645 µm designed for methane (CH) monitoring using differential absorption lidar (DIAL) measurements in the atmosphere. The emitter is also suited for coherent wind Doppler lidar.

Hybrid fiber/bulk laser source designed for CO and wind measurements at 2.05 µm: publisher's note.

This publisher's note contains a correction to Opt. Lett.49, 969 (2024)10.

Hybrid fiber/bulk laser source designed for CO and wind measurements at 2.05 µm.

We present a hybrid fiber/bulk laser source designed for CO and wind monitoring using differential absorption LIDAR (DIAL) and coherent detection at 2.05 µm. This source features a master oscillator power amplifier (MOPA) architecture made of four fiber stages and one single-pass, end-pumped, bulk amplifier.

2-μm double-pulse single-frequency Tm:fiber laser pumped Ho:YLF laser for a space-borne CO lidar.

In the framework of space-borne CO lidar development, the transmitter is a critical unit. We report on the development and the assessment of performances of a 2-μm single-frequency thulium fiber laser pumped Q-switched Ho:YLF laser. To fulfill the requirements of space-based operation, a master oscillator power amplifier architecture has been chosen, and the oscillator works in double-pulse operation.

Evaluation of a HgCdTe e-APD based detector for 2 μm CO DIAL application.

Benefiting from close to ideal amplification properties (high gain, low dark current, and low excess noise factor), HgCdTe electron initiated avalanche photodiode (e-APD) technology exhibits state of the art sensitivity, thus being especially relevant for applications relying on low light level detection, such as LIDAR (Light Detection And Ranging). In addition, the tunable gap of the HgCdTe alloy enables coverage of the short wavelength infrared (SWIR) and especially the 2 μm spectral range. For these two reasons, a HgCdTe e-APD based detector is a promising candidate for future differential absorption LIDAR missions targeting greenhouse gas absorption bands in SWIR.

2-μm Ho emitter-based coherent DIAL for CO(2) profiling in the atmosphere.

We report on the use of a thulium-fiber-pumped holmium-based emitter in a coherent differential absorption lidar (CDIAL) experiment for high time and space resolution of CO(2) absorption field in the atmosphere. The 2-μm high-power dual-wavelength single-mode Q-switched Ho:YLF oscillator delivers 10-mJ pulses with a duration of 40 ns at 2 kHz. Both short pulse duration and high repetition rate were chosen to increase the DIAL precision and time and space resolution in coherent detection.

An a posteriori method based on photo-acoustic cell information to correct for lidar transmitter spectral shift: application to atmospheric CO(2) differential absorption lidar measurements.

An a posteriori corrective method based on photo-acoustic cell (PAC) information is proposed to correct for laser transmitter spectral shift during atmospheric CO(2) measurements by 2 microm heterodyne differential absorption lidar (HDIAL) technique. The method for using the PAC signal to retrieve the actual atmospheric CO(2) absorption is presented in detail. This issue is tackled using a weighting function.