Topic
Continuous wave
About: Continuous wave is a research topic. Over the lifetime, 8076 publications have been published within this topic receiving 118747 citations.
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TL;DR: In this paper, power scaling of continuous-wave fiber lasers with up to 0.5 kW output powers from a single fibre with nearly diffraction-limited beam quality without the limitation of nonlinear effects is reported.
Abstract: Power scaling of continuous-wave fibre lasers with up to 0.5 kW output powers from a single fibre with nearly diffraction-limited beam quality without the limitation of nonlinear effects is reported.
220 citations
TL;DR: In this article, the authors used a continuous-wave terahertz spectrometer based on photomixing in the frequency range from 60GHz to 1.8THz to obtain the most precise data of "(!) reported to date for the wellstudied example of -lactose monohydrate.
Abstract: Measuring the complex dielectric function "(!) = "1 +i"2 of solid- state samples in the terahertz frequency range with high spectral resolution remains difficult. Using a continuous-wave terahertz spectrometer based on photomixing in the frequency range from 60GHz to 1.8THz, we obtain the most precise data of "(!) reported to date for the well-studied example of -lactose monohydrate. We are able to determine both "1 and "2 due to coherent detection and show that the results are Kramers-Kronig consistent. Our analysis is based on scanning an interference pattern in frequency and relies on the high spectral resolution in the MHz range. This enables us to avoid mechanically moving parts such as a delay stage. Moreover, we show that the optical data can be used to determine both "(!) and the sample thickness d independently.
220 citations
TL;DR: In this article, the continuous-wave operation of InGaN multi-quantum-well-structure laser diodes was demonstrated at room temperature with a lifetime of 24-40 min.
Abstract: The continuous-wave operation of InGaN multi-quantum-well-structure laser diodes (LDs) was demonstrated at room temperature with a lifetime of 24–40 min. The threshold current and the voltage of the LDs were 80 mA and 6.5 V, respectively. The laser emission was a fundamental single-mode emission with a peak wavelength of 400.23 nm and a full width at half-maximum of 0.002 nm. The beam full width at half-power values for the parallel and the perpendicular near-field patterns were 1.6 and 0.8 μm, respectively. Those of the far-field patterns were 6.8° and 33.6°, respectively. The carrier lifetime and the threshold carrier density were estimated to be 5 ns and 1×1020/cm3, respectively.
219 citations
TL;DR: It is shown that optical cavities have been used to enhance the nonlinear interaction for continuous wave CW pumping but this limits the bandwidth and also increases the total linear loss.
Abstract: Generation of squeezed light is at present limited to narrow regions of the optical spectrum.(1–3) For the parametric amplifiers used to generate squeezed light, this limit is imposed by the following properties of the nonlinear material used for the parametric process: 1) small nonlinear response, 2) linear losses, 3) insufficient laser pump power and 4) optical damage at high pump powers. Optical cavities have been used(1,2) to enhance the nonlinear interaction for continuous wave CW pumping but this limits the bandwidth and also increases the total linear loss.
216 citations
TL;DR: In this paper, a 1.3/spl mu/m continuous wave lasing operation was demonstrated in a GaInNAs quantum-well laser at room temperature, which was achieved by increasing the nitrogen content (up to 1%) in the quantum layer.
Abstract: A 1.3-/spl mu/m continuous wave lasing operation is demonstrated, for the first time, in a GaInNAs quantum-well laser at room temperature. This lasing performance is achieved by increasing the nitrogen content (up to 1%) in GaInNAs quantum layer. It is thus confirmed that this type of laser is suitable for use as a light source for optical fiber communications.
214 citations