Fourier spectral shaper assisted feedback for wavelength and linewidth control of cascaded Raman fiber lasers.

Cascaded Raman fiber lasers (CRFLs) with wavelength-independent feedback can provide power at any wavelength in near-IR regions. However, broad feedback leads to a broad output spectrum, decreasing spectral power density at a desired wavelength. The output characteristics of CRFLs can be controlled by controlling the feedback.

Does economic policy uncertainty, nuclear energy, and crude oil influence CO emissions? A sectoral growth analysis on G20 countries.

The G20 nations collectively accounted for a significant portion of global CO emissions due to their vast economies and rising energy demand. While some G20 nations have made substantial efforts to reduce their emissions through policies such as renewable energy incentives and carbon pricing, others may still heavily rely on fossil fuels for energy production and industrial processes. Therefore, this recent study endeavoured to investigate the relationship between nuclear energy consumption (NEC), crude oil (CO), and economic policy uncertainty (EPU) with CO emissions in three economic sectors of G20 nations.

Linewidth reduced cascaded Raman fiber lasers and their harmonic conversion for visible laser sources.

Cascaded Raman Fiber Lasers (CRFLs) are wavelength versatile sources that can provide power at any wavelength in the Near-Infrared (NIR) region. Conventional CRFLs with broadband feedback are widely wavelength tunable but have broad line widths. A feedback mechanism must be used to reduce the broadening of the linewidth without compromising the wavelength tunability.

Food security and sustainability dimensions of organic farming in the context of India: a comprehensive scientometric review (2010-2023).

The study investigated the scientific output, collaboration, and impression of research on organic farming due to the increasing interest of commoners in food quality and sustainability. Efforts to enhance agroecological sustainability call for assessing the structural overview of the numerous research works done so far to understand the growth in diverse subject areas in organic farming. The scientometric method is considered for analyzing 639 documents extracted from the Scopus and WoS online database from 2010 till January, 2023.

Cascaded Raman fiber lasers with ultrahigh spectral purity.

Random distributed feedback (RDFB) cascaded Raman fiber lasers (CRFLs) are simple, wavelength agile, and enable high-power fiber lasers outside emission bandwidths of rare-earth doped fiber lasers. However, the spectral purity, defined as the percentage of total output power in the desired Stokes wavelength band, and relative intensity noise (RIN) of these systems are limited due to the intensity noise of the pump source used for Raman conversion. RIN gets amplified and transferred to Raman Stokes orders which causes incomplete Raman conversion and hence limits the spectral purity.