SBS reduction in nanosecond fiber amplifiers by frequency chirping.

We demonstrate a technique for SBS reduction in a nanosecond Yb-fiber amplifier by imposing 1.19 GHz/ns frequency chirp on the seed pulses with a pulse-driven phase modulator. A nearly 9-fold increase in the SBS threshold was observed for 8.

Awake video-assisted thoracic surgery in acute infectious pulmonary destruction.

Background: Many of thoracic minimally invasive interventions have been proven to be possible without general anesthesia. This article presents results of video-assisted thoracic surgery (VATS) application under local anesthesia in patients with lung abscesses and discusses its indications in detail.

Methods: The study involved prospective analysis of treatment outcomes for all acute infectious pulmonary destruction (AIPD) patients undergoing VATS under local anesthesia and sedation since January 1, 2010, till December 31, 2013.

Spectral response of fiber-coupled Fabry-Perot etalons.

In many remote sensing applications one or multiple Fabry-Perot etalons are used as high-spectral-resolution filter elements. These etalons are often coupled to a receiving telescope with a multimode fiber, leading to subtle effects of the fiber mode order on the overall spectral response of the system. A theoretical model is developed to treat the spectral response of the combined system: fiber, collimator, and etalon.