Effectiveness of Millet-Pulse-Groundnut Based Formulations in Improving the Growth of Pre-School Tribal Children in Telangana State, India.

A community-level nutritional intervention was implemented among tribal children (3 to 6 years of age) in Telangana, India. The one-year intervention involved six nutrient-rich formulations of millet-pulse-groundnut-based products suited to local taste preferences. Anthropometric measurements of height, weight, and mid-upper-arm circumference (MUAC) along with haemoglobin (Hb) levels were monitored at baseline and endline.

High optical gain in erbium-doped potassium double tungstate channel waveguide amplifiers.

We report on the optical-gain properties of channel waveguides patterned into lattice-matched KGdxLuyErxy(WO) layers grown onto undoped KY(WO) substrates by liquid phase epitaxy. A systematic investigation of gain is performed for five different Er concentrations in the range of 0.75 to 10at.

Temperature-dependent absorption and emission of potassium double tungstates with high ytterbium content.

We study the spectroscopic properties of thin films of potassium ytterbium gadolinium double tungstates, KYbGd(WO), and potassium ytterbium lutetium double tungstates, KYbLu(WO), specifically at the central absorption line near 981 nm wavelength, which is important for amplifiers and lasers. The absorption cross-section of both thin films is found to be similar to those of bulk potassium rare-earth double tungstates, suggesting that the crystalline layers retain their spectroscopic properties albeit having >50 at.% Yb concentration.

Thulium channel waveguide laser with 1.6 W of output power and ∼80% slope efficiency.

Laser experiments were performed on buried, ridge-type channel waveguides in 8 at.% thulium-doped, yttrium-gadolinium-lutetium co-doped potassium double tungstate. By pumping with a Ti:sapphire laser at 794 nm, 1.

Yb:KYW planar waveguide laser Q-switched by evanescent-field interaction with carbon nanotubes.

We report Q-switched operation of a planar waveguide laser by evanescent-field interaction with single-walled carbon nanotubes deposited on top of the waveguide. The saturable-absorber-integrated gain medium, which operates based on evanescent-field interaction, enables the realization of a diode-pumped 2.5-cm-long Q-switched Yb:KYW waveguide laser emitting at 1030 nm.