THz-dual-frequency Yb
 3+
 :KGd(WO
 4
 )
 2
 laser for continuous wave THz generation through photomixing

Czarny, Romain; Alouini, Mehdi; Larat, Christian; Krakowski, Michael; Dolfi, Daniel

doi:10.1049/el:20040597

Cited by 61 publications

(38 citation statements)

References 11 publications

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“…The dual-frequency laser, sustaining two orthogonal linear polarizations with a tunable frequency difference can perfectly fit the above mentioned applications. Such dual-frequency operation has been achieved for different solid-state lasers [6,7], but these lasers suffer from relatively strong intensity noise due to relaxation oscillations inherent to their class-B dynamical behavior [8]. The dual-frequency vertical-external-cavity surfaceemitting laser (DF-VECSEL) exhibits low noise due to its relaxation oscillation free class-A dynamical behavior, as the photon lifetime (∼10 ns) inside the cm-long external cavity is longer than the carriers' lifetime (∼3 ns) of the semiconductor gain medium.…”

Section: Introductionmentioning

confidence: 99%

Intensity- and phase-noise correlations in a dual-frequency vertical-external-cavity surface-emitting laser operating at telecom wavelength

Baili

Bouchoule³

et al. 2015

Phys. Rev. A

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The amplitude and phase noises of a dual-frequency vertical-external-cavity surface-emitting laser (DF-VECSEL) operating at telecom wavelength are theoretically and experimentally investigated in detail. In particular, the spectral behavior of the correlation between the intensity noises of the two modes of the DF-VECSEL is measured. Moreover, the correlation between the phase noise of the radio-frequency (RF) beatnote generated by optical mixing of the two laser modes with the intensity noises of the two modes is investigated. All these spectral behaviors of noise correlations are analyzed for two different values of the nonlinear coupling between the laser modes. We find that to describe the spectral behavior of noise correlations between the laser modes, it is of utmost importance to have a precise knowledge about the spectral behavior of the pump noise, which is the dominant source of noise in the frequency range of our interest (10 kHz to 35 MHz). Moreover, it is found that the noise correlation also depends on how the spatially separated laser modes of the DF-VECSEL intercept the noise from a multi-mode fiber-coupled laser diode used for pumping both the laser modes. To this aim, a specific experiment is reported, which aims at measuring the correlations between different spatial regions of the pump beam. The experimental results are in excellent agreement with a theoretical model based on modified rate equations.

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Section: Introductionmentioning

confidence: 99%

Intensity- and phase-noise correlations in a dual-frequency vertical-external-cavity surface-emitting laser operating at telecom wavelength

Baili

Bouchoule³

et al. 2015

Phys. Rev. A

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“…Dual wavelength semi-conductors driven by a diffraction grating can be used but solid-state lasers with good beam quality and high output power are also of interest. The spectral tunability of the frequency difference is obtained by inserting a selective optical element, [8] with the help of two etalons and a half-wave plate in order to work with the best polarization (gain optimization) inside the gain medium. With the unusual c-orientation of a Nd:GdVO 4 crystal a dualwavelength laser was built and 0.56 THz radiation was produced from a GaSe nonlinear crystal [9].…”

Section: Introductionmentioning

confidence: 99%

Tunable THz frequency difference from a diode-pumped dual-wavelength Yb3+:KGd(WO4)2 laser with chirped volume Bragg gratings

Brenier

2011

Laser Phys. Lett.

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Abstract:We have demonstrated a simple and compact tunable dual-wavelength Yb 3+ :KGd(WO4)2 (Yb:KGW) laser. The laser is diode pumped through an optical bifurcated fiber and an adjustable beamsplitter. Thanks to two transversally chirped volume Bragg gratings (TCVBG) used as output couplers, the frequency difference between the two collinear waves is continuously tunable from 0 up to 7.8 THz with 110 GHz bandwidth. The frequency range is only limited by non optimized optical components and not by the principle of functioning. Wavelength, nm o-laser, R' = 90% e-laser, R' = 90% o-laser, R' = 80% e-laser, R' = 80%

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“…Indeed, in such two-axis lasers, the orthogonal linear polarizations are spatially separated in one part of the cavity, permitting a differential wavelength selection of the two modes. This pushes the beat frequency limit up to the total gain bandwidth of the active medium, i.e., several THz for erbiumdoped [20], Yb-doped [21], or TiAl 2 O 3 [22] lasers. The proposed two-propagation-axis laser of Fig.…”

Section: B Two-axis Lasers For Thz Generationmentioning

confidence: 99%

Bridging the gap between THz and microwave photonics through optoelectronic generation of interleaved combs Invited paper

Alouini¹,

Rolland²,

Pouget³

et al. 2014

Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meetin

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Optoelectronic down-conversion and phase locking of mm-wave and THz optical beatnotes using interleaved combs is presented. The generation of the required combs using either nonlinear modulation or four-wave-mixing in highly nonlinear fibers is detailed. These down conversion techniques are then implemented to phase-lock widely tunable mm-wave beatnotes well below the laser linewidth itself. Such achievements are made possible through a thorough trade-off between laser characteristics, optoelectronic arrangement, and electronicfeedback design. These advanced techniques give a new trend for bridging the gap between microwave and THz photonics.

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THz-dual-frequency Yb ³⁺ :KGd(WO ₄ ) ₂ laser for continuous wave THz generation through photomixing

Cited by 61 publications

References 11 publications

Intensity- and phase-noise correlations in a dual-frequency vertical-external-cavity surface-emitting laser operating at telecom wavelength

Intensity- and phase-noise correlations in a dual-frequency vertical-external-cavity surface-emitting laser operating at telecom wavelength

Tunable THz frequency difference from a diode-pumped dual-wavelength Yb3+:KGd(WO4)2 laser with chirped volume Bragg gratings

Bridging the gap between THz and microwave photonics through optoelectronic generation of interleaved combs Invited paper

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THz-dual-frequency Yb 3+ :KGd(WO 4 ) 2 laser for continuous wave THz generation through photomixing

Cited by 61 publications

References 11 publications

Intensity- and phase-noise correlations in a dual-frequency vertical-external-cavity surface-emitting laser operating at telecom wavelength

Intensity- and phase-noise correlations in a dual-frequency vertical-external-cavity surface-emitting laser operating at telecom wavelength

Tunable THz frequency difference from a diode-pumped dual-wavelength Yb3+:KGd(WO4)2 laser with chirped volume Bragg gratings

Bridging the gap between THz and microwave photonics through optoelectronic generation of interleaved combs Invited paper

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THz-dual-frequency Yb ³⁺ :KGd(WO ₄ ) ₂ laser for continuous wave THz generation through photomixing