A fully tunable dual-color CW Ti:Al/sub 2/O/sub 3/ laser

Siebe, Frank; Siebert, Karsten; Leonhardt, R.; Roskos, Hartmut G.

doi:10.1109/3.798099

Cited by 33 publications

(12 citation statements)

References 19 publications

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“…The spectrum with the highest spectral resolution obtained with a CW THz spectroscopy system based on the photomixing principle showed a spectral resolution better than 4 MHz [102]. A spectral resolution in the low MHz range was also demonstrated using a combination of an amplified diode laser and a Ti:sapphire ring oscillator [14], and a dual-color Ti:sapphire laser was used for THz imaging with a spectral resolution better than 150 MHz [54,103]. Thus, the frequency resolution offered by CW THz spectroscopy is significantly higher than that available with other spectroscopic techniques in the THz range.…”

Section: Continuous-wave Thz Generation and Detectionmentioning

confidence: 97%

Terahertz spectroscopy and imaging – Modern techniques and applications

Jepsen

Cooke

Koch

2010

Laser & Photonics Reviews

1,745

977

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Over the past three decades a new spectroscopic technique with unique possibilities has emerged. Based on coherent and time-resolved detection of the electric field of ultrashort radiation bursts in the far-infrared, this technique has become known as terahertz time-domain spectroscopy (THz-TDS). In this review article the authors describe the technique in its various implementations for static and time-resolved spectroscopy, and illustrate the performance of the technique with recent examples from solid-state physics and physical chemistry as well as aqueous chemistry. Examples from other fields of research, where THz spectroscopic techniques have proven to be useful research tools, and the potential for industrial applications of THz spectroscopic and imaging techniques are discussed.

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Section: Continuous-wave Thz Generation and Detectionmentioning

confidence: 97%

Terahertz spectroscopy and imaging – Modern techniques and applications

Jepsen

Cooke

Koch

2010

Laser & Photonics Reviews

1,745

977

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“…86 The advantage of using two modes in a single laser diode is the compact nature of the source, and a very narrow linewidth. 87 Other dual-mode lasers have been used to generate THzfrequency amplitude beats, for example a Ti:sapphire ring cavity, a Titsapphire Q-cavity 88 and a laser diode array with a bandwidth reaching 7 THz. 89 A novel method of tuning the THz beat frequency is to use two linearly chirped pulses, and control the phase difference between them at the photomixer with, for example, a Michelson interferometer.…”

Section: Photomixing In Biased Semiconductorsmentioning

confidence: 99%

T-Ray Sensing and Imaging

Mickan

Zhang

2003

Int. J. Hi. Spe. Ele. Syst.

110

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Terahertz (THz) radiation occupies part of the electromagnetic spectrum between the infrared and microwave bands. Until recently, technology at THz frequencies was underdeveloped compared to the rest of the electromagnetic spectrum, leaving a gap between millimeter waves and the far-infrared (FIR). In the past decade, interest in the THz gap has been increased by the development of ultrafast laser-based T-ray systems and their demonstration of diffraction-limited spatial resolution, picosecond temporal resolution, DC-THz spectral bandwidth and signal-to-noise ratios above 10 4 . This chapter reviews the development, the state of the art and the applications of T-ray spectrometers. Continuous-wave (CW) THz-frequency sources and detectors are briefly introduced in comparison to ultrafast pulsed THz systems. An emphasis is placed on experimental applications of T-rays to sensing and imaging, with a view to the continuing advance of technologies and applications in the THz band.

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“…The design usually encountered for THz emission on such antennas relies on the beating of two independent lasers [1] [3]. Alternative sources has been proposed, such as two longitudinal-mode lasers [4], or tunable dual-color laser [5] [6]. Semiconductor lasers are compact and low cost, however they suffer from a relatively poor spectral quality, because of the short carrier recombination time and of the Henry factor [7].…”

Section: Introductionmentioning

confidence: 99%

Dual-Frequency 780-nm Ti:Sa Laser for High Spectral Purity Tunable CW THz Generation

Loas

Romanelli

Alouini

2014

IEEE Photon. Technol. Lett.

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International audience— A two-axis, two-polarization, dual-frequency Ti:Sa laser optimized for high spectral purity CW-THz generation is demonstrated. The laser output power is 50mW. Its mean emission wavelength is optimized around 780nm in order to suit the maximum efficiency of low temperature grown GaAs photomixers. Despite the extremely wide gain bandwidth of Ti:Sa, a proper intracavity filtering design, adapted to this particular laser architecture, enables tunable and single-frequency operation of each laser mode. The resulting beatnote is shown to be tunable between DC and 1.5 THz by steps of 82GHz. Its linewidth is narrower than 30 kHz without any active stabilization or cavity insolation

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A fully tunable dual-color CW Ti:Al/sub 2/O/sub 3/ laser

Cited by 33 publications

References 19 publications

Terahertz spectroscopy and imaging – Modern techniques and applications

Terahertz spectroscopy and imaging – Modern techniques and applications

T-Ray Sensing and Imaging

Dual-Frequency 780-nm Ti:Sa Laser for High Spectral Purity Tunable CW THz Generation

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