Spectral Database

Our laboratory focuses on measuring key parameters in combustion and spectroscopy. We compile a high-temperature spectral database and measure ignition delay times.

Ignition Delay Time Database:
Our ignition delay time database is designed to offer key information on combustion properties over a diverse range of temperatures and pressures. By utilizing shock tubes and rapid compression machines (RCMs), this database provides researchers with accurate ignition delay times, enabling the modeling and optimization of various combustion processes.

Absorption Cross-Section Database:
Our absorption cross-section database is a robust collection of high-temperature measurements. Leveraging narrow-linewidth tunable lasers and high-resolution Fourier Transform Infrared (FTIR) spectrometers, it provides a comprehensive resource for understanding the behavior of gases under various conditions. This data supports the design of combustion and environmental monitoring systems.

Spectral Parameters Database:
The spectral parameters database comprises detailed measurements collected using state-of-the-art equipment like Quantum Cascade Lasers (QCL) and Difference Frequency Generation (DFG) lasers. This data offers insights into high-temperature spectral behavior, aiding researchers in spectroscopic analysis and enhancing applications in combustion diagnostics and environmental studies.

Absorption cross-section measurements :

Year	Paper	Molecule	Temperature range:	Frequency range: (cm-1)	Technique	Measured Data
2013	Temperature-dependent absorption cross-section measurements of 1-butene (1-C4H8) in VUV and IR	1-butene (1-C4H8)	296-529 K	48780.49-66666.67 400-6500	Synchrotron radiation (a tunable VUV light source) FTIR	Cross Sections of 1-butene (VUV) Cross sections of 1-butene (IR)
2014	Absorption cross-section measurements of methane, ethane, ethylene and methanol at high temperatures	Methane (CH4) Ethylene (C2H4) Ethane (C2H6) Methanol (CH3OH)	296-1100 K	2800-3400	FTIR	Cross sections of Methane Cross sections of Ethylene Cross sections of Ethane Cross sections of Methanol
2014	Infrared cross-sections and integrated band intensities of propylene: Temperature-dependent studies	Propylene (C3H6)	296-460 K	400-6500	FTIR	Cross sections of Propylene
2014	Quantitative mid-infrared spectra of allene and propyne from room to high temperatures	Allene (CH2CCH2) Propyne (C3H4)	296 K-510 K	580-3400	FTIR	Cross sections of Allene Cross sections of Propyne
2015	High-temperature measurements of methane and acetylene using quantum cascade laser absorption near 8 μm	Methane (CH4) Acetylene (C2H2)	1200–2200 K	1217–1328	CW EC QCL \| Shock tube	Cross sections of Methane Cross sections of Acetylene
2021	A laser diagnostic for HCN detection in mid-infrared	Hydrogen cyanide (HCN)	1000-3000 K	711-716	Comb-referenced widely tunable nonlinear laser source \| Shock tube	Cross sections of Hydrogen Cyanide
2022	High-temperature mid-IR absorption spectra and reaction kinetics of 1,3-dioxolane	1,3-dioxolane (C3H6O2)	296-852 K	900-1200	EC QCL (MIRcat)	Cross sections of 1,3 dioxolane
2023	High-temperature mid-IR absorption and reaction kinetics of 2-methyl-1,3-dioxolane: An experimental and theoretical study	2-methyl-1,3-dioxolane (C4H8O2)	1050–1400 K	950–1190	EC QCL (MIRcat) \| Shock tube	Cross sections of 2-methyl-1,3-dioxolane
2023	Mid-IR Absorption Spectra of C1-C4 Alkyl Acetates at High Temperatures	Methyl acetate (C3H6O2) Ethyl acetate (C4H8O2) n-propyl acetate (C5H10O2) n-butyl acetate (C6H12O2)	580 – 980 K	1160 – 1330	EC QCL (MIRcat) \| Shock tube	Cross sections of methyl acetate Cross sections of ethyl acetate Cross sections of n-propyl acetate Cross sections of n-butyl acetate

Spectral Parameters:

Year	Paper	Molecule	Temperature range:	Frequency range: (cm^-1)	Technique	Measured Data
2013	Measurements of NH3 linestrengths and collisional broadening coefficients in N2, O2, CO2, and H2O near 1103.46 cm−1	Ammonia (NH3) in N2 Ammonia (NH3) in O2 Ammonia (NH3) in CO2 Ammonia (NH3) in H2O	296 K	1100.4–1108.2	Tunable QCL	Linestrength and collisional broadening coefficients narrowing
2014	Measurements of linestrengths, N2-, Ar-, He- and self-broadening coefficients of acetylene in the ν4+ν5 combination band using a cw quantum cascade laser	Acetylene (C2H2) in N2 Acetylene (C2H2) in He Acetylene (C2H2) in Ar	296–683 K	1253-1310	CW QCL	Linestrength and collisional broadening narrowing coefficients
2014	Intensities, broadening and narrowing parameters in the ν3 band of methane	Methane (CH4)	296 K	2905-2908	Tunable DFG Laser system	Intensities and collisional broadening coefficients narrowing
2016	Quantum Cascade Laser Measurements of Line Intensities, N2-, O2- and Ar- Collisional Broadening Coefficients of N2O in the ν3 Band Near 4.5 µm	Nitrous Oxide (N2O) in N2 Nitrous Oxide (N2O) in O2 Nitrous Oxide (N2O) in Ar	296 K	2190-2202	QCL	Intensities and Nitrous Oxide Collisional Broadening Coefficients
2016	First line shape analysis and spectroscopic parameters for the ν11 band of 12C2H4	Ethylene (12th C2H4)	296 K	2975–2980	DFG Laser system	The ν11 band (line intensities, collisional broadening coefficients and narrowing parameters)
2018	High accuracy line positions of the ν1 fundamental band of 14N216O	Nitrous Oxide (14th N2, 16th O)	296 K	1240-1310	EC-QCL t NIR Tm:based frequency comb	Line Strength of the ν1 band of N2O, from P(40) to R(31),
2021	Line-strengths, collisional coefficients and narrowing parameters in the ν3 band of methane: H2, He, N2, O2, Ar and CO2 collider effects	Methane (12th CH4)	296K	2884-2969	DFG Laser	Line-strengths, collisional coefficients and narrowing parameters in the ν3 band of methane

Farooq's group for Advanced Sensing Technology and Energy Research (FASTER)

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