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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07 May 2000
TL;DR: In this paper, a high-repetition-rate, high-average-power femtosecond Ti:sapphire laser realized by applying an intracavity continuous wave (CW) amplifier is described.
Abstract: Summary form only given. The requirement for the average power of high-repetition-rate femtosecond lasers has been one of the most important factor for these lasers used as pumping sources of THz-radiation from InAs in a magnetic field. Also, the average power is important for the various parametric wavelength conversions. However, the output average power of femtosecond mode-locked lasers has been limited to the 2-W level. In the presentation, we describe a high-repetition-rate, high-average-power, femtosecond Ti:sapphire laser realized by applying an intracavity continuous wave (CW) amplifier.
01 Nov 2012
TL;DR: In this article, two photonic techniques for generating tunable continuous-wave microwave signals were proposed and demonstrated using a mode-locked fiber laser (MFL) and a photonic processing of a pulse-train generated by a laser.
Abstract: This paper reviews two photonic techniques which have been recently proposed and demonstrated by us for generating tunable continuous-wave microwave signals. In general, both techniques are based on the photonic processing of a pulse-train generated by a mode-locked fiber laser.
TL;DR: In this paper, the authors developed a new, frequency tripled 355 nm CW lase r to produce power up to 200 mW with a noise level of 0.2% rms within an 8 MHz bandwidth and with peak to peak noise of 2%.
Abstract: We have developed a new, frequency tripled 355 nm CW lase r to produce power up to 200 mW. The noise level of the laser is 0.2% rms within an 8 MHz bandwidth and with a peak to peak noise of 2%. Side pumped Nd:YVO 4 is the gain medium. The laser mode efficiently samples the diode array pump mode. Frequency doubling and tripling is internal to the 1064 nm cavity. This paper discusses the characteristics su ch as power, the noise performance and the beam quality of the laser, along with some potential applications. Keywords: continuous-wave, 355 nm, intra-cavity, fre quency tripled, side pumped, Nd:YVO 4 1. INTRODUCTION The need for a true 355 nm, CW laser exists in fields su ch as microscopy, flow cytometry, wafer inspection and life sciences. There are several laser devices which are capable of producing CW or quasi-CW laser power in the vicinity of 355 nm, the third harmonic of the Nd laser. The different types of lasers capable of producing CW are as follows: x Gas lasers such as the water cooled Argo n or Krypton ion lasers or He-Cd lasers x Quasi-CW, mode locked, Nd:YVO
13 May 2010
TL;DR: In this paper, a method for direct measurement of the spectrum of a mode-locked diode laser using the beat note between the diode and a continuous wave laser was presented. But this method was not applicable to the case of a diode in full mode-locking, and various methods were suggested to explain the difficulty.
Abstract: This thesis presents the development of a method for the direct measurement of the spectrum of a mode-locked diode laser using the beat note between the mode-locked laser and a continuous wave laser. This beat note frequency allows for the measurement of the optical frequency comb created by the mode-locked diode laser. The spectrum of the mode-locked diode laser was optimized using a spectrometer and an electronic amplification and filtering circuit was created to try and see the beat note frequency as it is expected to be small compared to the higher frequency terms created by the mode-locked diode laser. A beat note was observed with the diode laser in continuous wave mode and in a partially mode-locked state. The beat note with the diode laser in full mode-locking was not seen and various methods are suggested to explain and resolve this difficulty.
06 May 2007
TL;DR: In this article, a sensitive method to detect 1s paraexcitons in Cu2O by using cw laser-based excitonic Lyman spectroscopy with a tunable 2D laser was developed.
Abstract: We developed a sensitive method to detect 1s paraexcitons in Cu2O by using cw laser-based excitonic Lyman spectroscopy with a tunable Cu2O laser. The paraexcitons were found to have a lifetime of microseconds.