Research Data Leeds Repository

Citation

Kondawar, Sanchit S. and North, Nicholas K. and Han, Yingjun and Pardo, Diego and Brewster, Nick and Horbury, Michael D. and Salih, Mohammed and Li, Lianhe and Dean, Paul and Freeman, Joshua R. and Ellison, Brian and Kundu, Iman and Valavanis, Alexander (2024) Data associated with "Power stabilization of a terahertz-frequency quantum-cascade laser using a photonic-integrated modulator". University of Leeds. [Dataset] https://doi.org/10.5518/1522

Dataset description

This dataset is associated with the manuscript "Power stabilization of a terahertz-frequency quantum-cascade laser using a photonic-integrated modulator". We demonstrate a technique to stabilize the emission from a ~3.5 THz quantum-cascade laser against long-term power drifts, using a recently developed Photonic Integrated Circuit (PIC) structure formed by coupling a racetrack resonator with a ridge waveguide. Successful locking over >600 s was achieved using a proportional–integral control loop. A technique for integrating the PIC with a precision micromachined rectangular metallic waveguide module has also been demonstrated.

Keywords:	Terahertz quantum-cascade lasers; integrated photonics; laser modulation; solid-state lasers; laser resonators; laser stabilisation
Subjects:	F000 - Physical sciences > F300 - Physics > F360 - Optical physics > F361 - Laser physics H000 - Engineering > H600 - Electronic & electrical engineering
Divisions:	Faculty of Engineering and Physical Sciences > School of Electronic and Electrical Engineering Faculty of Engineering and Physical Sciences > School of Electronic and Electrical Engineering > Pollard Institute
Related resources:	Location Type https://doi.org/10.1364/OE.529879 Publication https://eprints.whiterose.ac.uk/215104/ Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	02 Aug 2024 16:32
URI:	https://archive.researchdata.leeds.ac.uk/id/eprint/1308
Additional details Additional details Creators or authors: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Kondawar, Sanchit S. https://orcid.org/0000-0003-3918-9472 University of Leeds https://ror.org/024mrxd33 ror North, Nicholas K. https://orcid.org/0009-0002-8221-2893 University of Leeds https://ror.org/024mrxd33 ror Han, Yingjun https://orcid.org/0000-0003-2141-3077 University of Leeds https://ror.org/024mrxd33 ror Pardo, Diego Rutherford Appleton Laboratory https://ror.org/03gq8fr08 ror Brewster, Nick Rutherford Appleton Laboratory https://ror.org/03gq8fr08 ror Horbury, Michael D. https://orcid.org/0000-0001-8235-8142 University of Leeds https://ror.org/024mrxd33 ror Salih, Mohammed https://orcid.org/0009-0001-6882-4642 University of Leeds https://ror.org/024mrxd33 ror Li, Lianhe https://orcid.org/0000-0003-4998-7259 University of Leeds https://ror.org/024mrxd33 ror Dean, Paul https://orcid.org/0000-0002-3950-4359 University of Leeds https://ror.org/024mrxd33 ror Freeman, Joshua R. https://orcid.org/0000-0002-5493-6352 University of Leeds https://ror.org/024mrxd33 ror Ellison, Brian https://orcid.org/0000-0003-2762-8095 Rutherford Appleton Laboratory https://ror.org/03gq8fr08 ror Kundu, Iman https://orcid.org/0000-0002-3564-1903 University of Leeds https://ror.org/024mrxd33 ror Valavanis, Alexander https://orcid.org/0000-0001-5565-0463 University of Leeds https://ror.org/024mrxd33 ror Type of data: Dataset Research funders: UKRI, UK Space Agency Grant numbers: MR/S016929/1, MR/Y011775/1, NSTP3-FT2-002 Publication date: 2024 Resource language: English Metadata language: English Publisher: University of Leeds Contact email: s.kondawar@leeds.ac.uk Last Modified: 13 Aug 2024 09:15

Files

Documentation

readme [2kB] readme [2kB] readme [2kB] Security: Anyone File name: readme1522.txt Content type: Documentation Mime-Type: text/plain License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 2kB

Data

QCL voltage & THz power vs current (10 K) [31kB] QCL voltage & THz power vs current (10 K) [31kB] QCL voltage & THz power vs current (10 K) [31kB] Security: Anyone File name: fig2a-10K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 31kB

QCL voltage & THz power vs current (40 K) [30kB] QCL voltage & THz power vs current (40 K) [30kB] QCL voltage & THz power vs current (40 K) [30kB] Security: Anyone File name: fig2a-40K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 30kB

QCL voltage & THz power vs current (50 K) [29kB] QCL voltage & THz power vs current (50 K) [29kB] QCL voltage & THz power vs current (50 K) [29kB] Security: Anyone File name: fig2a-50K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 29kB

QCL voltage & THz power vs current (60 K) [29kB] QCL voltage & THz power vs current (60 K) [29kB] QCL voltage & THz power vs current (60 K) [29kB] Security: Anyone File name: fig2a-60K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 29kB

QCL voltage & THz power vs current (63 K) [29kB] QCL voltage & THz power vs current (63 K) [29kB] QCL voltage & THz power vs current (63 K) [29kB] Security: Anyone File name: fig2a-63K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 29kB

RTR voltage & THz power vs current (40 K) [3kB] RTR voltage & THz power vs current (40 K) [3kB] RTR voltage & THz power vs current (40 K) [3kB] Security: Anyone File name: fig2b.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). QCL at 1.3 A bias License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 3kB

QCL emission spectra vs QCL current [54kB] QCL emission spectra vs QCL current [54kB] QCL emission spectra vs QCL current [54kB] Security: Anyone File name: fig3a.dat Content type: Data Description: Col 1: Frequency (THz); Col 2-8: Spectral intensity (a.u.). Each column is for different QCL current, increasing from 600-1200 mA in 100 mA increments License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 54kB

QCL emission spectra vs RTR current [49kB] QCL emission spectra vs RTR current [49kB] QCL emission spectra vs RTR current [49kB] Security: Anyone File name: fig3b.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2-7: Spectral intensity (a.u.). Each column is for different RTR current, increasing from 0-500 mA in 100 mA increments License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 49kB

THz power vs time (unlocked) [178kB] THz power vs time (unlocked) [178kB] THz power vs time (unlocked) [178kB] Security: Anyone File name: fig5ac.dat Content type: Data Description: Col 1: time (s); Col 2: detector signal (V) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 178kB

THz power vs time (locked) [177kB] THz power vs time (locked) [177kB] THz power vs time (locked) [177kB] Security: Anyone File name: fig5bd.dat Content type: Data Description: Col 1: time (s); Col 2: detector signal (V) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 177kB

Integrated QCL voltage & THz power vs current (10 K) [3kB] Integrated QCL voltage & THz power vs current (10 K) [3kB] Integrated QCL voltage & THz power vs current (10 K) [3kB] Security: Anyone File name: fig7-10K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 3kB

Integrated QCL voltage & THz power vs current (30 K) [3kB] Integrated QCL voltage & THz power vs current (30 K) [3kB] Integrated QCL voltage & THz power vs current (30 K) [3kB] Security: Anyone File name: fig7-30K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 3kB

Integrated QCL voltage & THz power vs current (50 K) [3kB] Integrated QCL voltage & THz power vs current (50 K) [3kB] Integrated QCL voltage & THz power vs current (50 K) [3kB] Security: Anyone File name: fig7-50K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 3kB

Integrated QCL voltage & THz power vs current (70 K) [3kB] Integrated QCL voltage & THz power vs current (70 K) [3kB] Integrated QCL voltage & THz power vs current (70 K) [3kB] Security: Anyone File name: fig7-70K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 3kB

Integrated QCL voltage & THz power vs current (90 K) [3kB] Integrated QCL voltage & THz power vs current (90 K) [3kB] Integrated QCL voltage & THz power vs current (90 K) [3kB] Security: Anyone File name: fig7-90K.dat Content type: Data Description: Col 1: Current (A); Col 2: Voltage (V); Col 3: THz detector signal (mV). RTR unbiased License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 3kB

Integrated QCL emission spectra (QCL current 500 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 500 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 500 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8a-500mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 600 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 600 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 600 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8a-600mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8a-700mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 800 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 800 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 800 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8a-800mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 900 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 900 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 900 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8a-900mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 1000 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 1000 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 1000 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8a-1000mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 1100 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 1100 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 1100 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8a-1100mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 1200 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 1200 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 1200 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8a-1200mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 0 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 0 mA) [40kB] Security: Anyone File name: fig8b-0mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 100 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 100 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 100 mA) [40kB] Security: Anyone File name: fig8b-100mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 200 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 200 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 200 mA) [40kB] Security: Anyone File name: fig8b-200mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 250 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 250 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 250 mA) [40kB] Security: Anyone File name: fig8b-250mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 300 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 300 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 300 mA) [40kB] Security: Anyone File name: fig8b-300mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 350 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 350 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 350 mA) [40kB] Security: Anyone File name: fig8b-350mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 400 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 400 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 400 mA) [40kB] Security: Anyone File name: fig8b-400mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Integrated QCL emission spectra (QCL current 700 mA; RTR current 500 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 500 mA) [40kB] Integrated QCL emission spectra (QCL current 700 mA; RTR current 500 mA) [40kB] Security: Anyone File name: fig8b-500mA.dat Content type: Data Description: Col 1: Wavenumber (1/cm); Col 2: Spectral intensity (a.u.) License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB