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: By exploiting nonlinear optical effects, a technology of unprecedented flexibility for the production of tunable coherent light has been developed that provides sources with spectral coverage extending all the way from the ultraviolet to the mid-infrared and temporal coverage extending over all time domains.
Abstract: By exploiting nonlinear optical effects, a technology of unprecedented flexibility for the production of tunable coherent light has been developed. Referred to as optical parametric generation, it provides sources with spectral coverage extending all the way from the ultraviolet to the mid-infrared, and with temporal coverage extending over all time domains from the femtosecond pulse to the continuous wave. Such sources generate coherent light of outstanding optical quality and are now finding wide-ranging applications.
255 citations
TL;DR: An external cavity (EC) quantum cascade laser (QCL) configuration with the thermoelectrically cooled gain medium fabricated using a bound-to-continuum design and operating in continuous wave at ∼5.2 μm is reported in this article.
Abstract: An external cavity (EC) quantum cascade laser (QCL) configuration with the thermoelectrically cooled gain medium fabricated using a bound-to-continuum design and operating in continuous wave at ∼5.2 μm is reported. The EC architecture employs a piezo-activated cavity mode tracking system for mode-hop free operation suitable for high resolution spectroscopic applications and multiple species trace-gas detection. The performance of the EC-QCL exhibits coarse single mode tuning over 35 cm-1 and a continuous mode-hop free fine tuning range of ∼1.2 cm-1.
254 citations
TL;DR: In this article, the authors reported the operation of a quantum cascade laser emitting at a 103μm wavelength (2.9THz) with an active region based on a bound-to-continuum design allowing a low parasitic leakage current, and a high upper-tolower-state lifetime ratio.
Abstract: We report the operation of a quantum cascade laser emitting at a 103μm wavelength (2.9THz). The active region is based on a bound-to-continuum design allowing a low parasitic leakage current, and a high upper-to-lower-state lifetime ratio. The latter is demonstrated by a pronounced decrease of the differential resistance at threshold, which is visible up to high temperatures, and by a weak temperature dependence of the slope efficiency. At 4K, we report a threshold current density of only 105A∕cm2 both in pulsed and continuous-wave operation, and an emitted peak power of 15mW independent of the duty cycle. Maximum operating temperatures of 95K and 70K are observed in pulsed and continuous wave modes, respectively.
247 citations
TL;DR: The first integrated optical laser in LiNbO3, doped by an indiffusion of Er3+ prior to channel-guide fabrication by Ti diffusion is reported in this article.
Abstract: The first integrated optical laser in LiNbO3, doped by an indiffusion of Er3+ prior to channel-guide fabrication by Ti diffusion is reported. Pumped by a colour centre laser (λp = 1.477 μm), CW operation at λ = 1.532 μm (Δ~0.3 nm) with a threshold of ~8 mW absorbed power was achieved.
221 citations
TL;DR: In this article, the first experimental demonstration of an end-pumped Cs laser using a Ti:sapphire laser for pump excitation is presented, and a discussion is given on power scaling diodepumped alkali lasers, indicating a potential efficiency advantage over power-scaled diode-pump solid-state lasers.
Abstract: End-pumped alkali vapor lasers excited on their D2 transition and lased on their D1 transition offer a pathway to high average power that potentially competes with diode-pumped solid-state lasers in many applications that require cw or quasi-cw laser operation. We report on the first experimental demonstration of an end-pumped Cs laser using a Ti:sapphire laser for pump excitation. Detailed experimental and model results are presented that indicate our understanding of the underlying physics involved in such systems is complete. Using an extrapolation of our developed model, a discussion is given on power scaling diode-pumped alkali lasers, indicating a potential efficiency advantage over power-scaled diode-pumped solid-state lasers.
221 citations