Phase Locking of 3.5-THz and 4.7-THz Quantum-Cascade Lasers Using a Schottky Diode Harmonic Mixer

Richter, Heiko; Rothbart, Nick; Wienold, Martin; Lü, Xiang; Schrottke, L.; Grahn, H. T.; Jayasankar, Divya; Drakinskiy, Vladimir; Stake, Jan; Sobis, Peter; Hübers, Heinz‐Wilhelm

doi:10.1109/irmmw-thz50926.2021.9566876

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…The results presented in this work are summarized along with other state-of-the-art technologies available for QCL frequency stabilization in Table II. Although the presented 3.5-THz, ×6-harmonic mixer exhibits a higher conversion loss than in the model, the SNR of the IF signal is sufficient for phase locking both 3.5-THz and 4.7 THz QCLs [36].…”

Section: B Rf Characterizationmentioning

confidence: 83%

A 3.5-THz, ×6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers

Jayasankar

Drakinskiy²,

Rothbart³

et al. 2021

IEEE Trans. THz Sci. Technol.

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Efficient and compact frequency converters are essential for frequency stabilization of terahertz sources. In this paper, we present a 3.5-THz, ×6-harmonic, integrated Schottky diode mixer operating at room temperature. The designed frequency converter is based on a single-ended, planar Schottky diode with a sub-micron anode contact area defined on a suspended 2-µm ultra-thin GaAs substrate. The dc-grounded anode pad was combined with the radio frequency E-plane probe, which resulted in an electrically compact circuit. At 200 MHz intermediate frequency, a mixer conversion loss of about 59 dB is measured resulting in a 40 dB signal-to-noise ratio for phase locking a 3.5-THz quantum-cascade laser. Using a quasi-static diode model combined with electromagnetic simulations, good agreement with the measured results was obtained. Harmonic frequency converters without the need of cryogenic cooling will help in the realization of highly sensitive space and air-borne heterodyne receivers.

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Section: B Rf Characterizationmentioning

confidence: 83%

A 3.5-THz, ×6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers

Jayasankar

Drakinskiy²,

Rothbart³

et al. 2021

IEEE Trans. THz Sci. Technol.

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Development of Supra-THz Schottky Diode Harmonic Mixers

Jayasankar

Drakinskiy

Sobis

et al. 2021

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)

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A 3.5-THz, x6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers

Jayasankar¹,

Drakinskiy²,

Rothbart³

et al. 2021

Preprint

View full text Add to dashboard Cite

Efficient and compact frequency converters are essential for frequency stabilization of terahertz sources. In this paper, we present a 3.5-THz, x6-harmonic, integrated Schottky diode mixer operating at room temperature. The designed frequency converter is based on a single-ended, planar Schottky diode with a sub-micron anode contact area defined on a suspended 2-um ultra-thin GaAs substrate. The dc-grounded anode pad was combined with the radio frequency E-plane probe, which resulted in an electrically compact circuit. At 200 MHz intermediate frequency, a mixer conversion loss of about 59 dB is measured resulting in a 40 dB signal-to-noise ratio in a phase-locking application. Using a quasi-static diode model combined with electromagnetic simulations, good agreement with the measured results was obtained. Harmonic frequency converters without the need of cryogenic cooling will help in the realization of highly sensitive space and air-borne heterodyne receivers.<br>

show abstract

Phase Locking of 3.5-THz and 4.7-THz Quantum-Cascade Lasers Using a Schottky Diode Harmonic Mixer

Cited by 3 publications

References 5 publications

A 3.5-THz, ×6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers

A 3.5-THz, ×6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers

Development of Supra-THz Schottky Diode Harmonic Mixers

A 3.5-THz, x6-Harmonic, Single-Ended Schottky Diode Mixer for Frequency Stabilization of Quantum-Cascade Lasers

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