A. Hjältén

collaborators

6 papers

physics.optics2026

Triple-Resonance Spectroscopy Using a Cavity-Enhanced Frequency Comb Probe

Qinxue Nie, Vinicius Silva de Oliveira, Adrian HjÃ¤ltÃ©n +3

Accurate experimentally verified models of molecular hot-band transitions are essential for interpreting high-temperature spectra in environments ranging from exoplanetary atmosphe…

physics.chem-ph2026

Optical frequency comb Fourier transform spectroscopy of the CH $_{2}$ $^{79}$ Br $^{81}$ Br, CH $_{2}$ $^{79}$ Br $_{2}$ , and CH $_{2}$ $^{81}$ Br $_{2}$ isotopologues in the 1180-1210 cm $^{- 1}$ region

Ibrahim Sadiek, Aleksandr A. Balashov, Adrian HjÃ¤ltÃ©n +3

Quantitative spectroscopic detection of dibromomethane, CH $_{2}$ Br $_{2}$ , for environmental monitoring, workplace safety, and exoplanetary studies is limited by the lack of accurate ab…

physics.chem-ph2026

Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm $^{- 1}$ states of ethylene

Adrian HjÃ¤ltÃ©n, Vinicius Silva de Oliveira, Yuan Cao +3

We use optical-optical double-resonance (OODR) spectroscopy to measure for the first time hot-band transitions of ethylene (C $_{2}$ H $_{4}$ ) between states in the 3000 cm $^{- 1}$ and…

physics.chem-ph2025

Measurement and assignment of E-symmetry states in the 6010-6110 cm $^{- 1}$ and 8940-9150 cm $^{- 1}$ ranges of methane using optical frequency comb double-resonance spectroscopy

Adrian HjÃ¤ltÃ©n, Vinicius Silva de Oliveira, Michael Rey +3

We use sub-Doppler optical-optical double-resonance (OODR) spectroscopy with a 3.3 $I^¼$ m single-frequency pump and a cavity-enhanced 1.65 $I^¼$ m comb probe to measure 33 ladder-type…

physics.optics2025

Combined frequency comb and continuous wave cavity-enhanced optical-optical double-resonance spectrometer in the 1.7 $I^¼$ m range

We present an optical-optical double-resonance (OODR) spectrometer based on a 3.3 $I^¼$ m continuous wave pump and two cavity-enhanced probes: a frequency comb tunable in the 1.64 -…

physics.chem-ph2025

Assignment of collision-induced four-level double-resonance transitions in the 3 $I^½$ $_{3}$ $\Leftarrow$ $I^½$ $_{3}$ spectral region of methane

Optical-optical double-resonance (OODR) spectroscopy using a narrow-linewidth pump and a frequency comb probe has previously been used to measure and assign sub-Doppler transitions…

Triple-Resonance Spectroscopy Using a Cavity-Enhanced Frequency Comb Probe

Optical frequency comb Fourier transform spectroscopy of the CH2​79Br81Br, CH2​79Br2​, and CH2​81Br2​ isotopologues in the 1180-1210 cm−1 region

Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm−1 states of ethylene

Measurement and assignment of E-symmetry states in the 6010-6110 cm−1 and 8940-9150 cm−1 ranges of methane using optical frequency comb double-resonance spectroscopy

Combined frequency comb and continuous wave cavity-enhanced optical-optical double-resonance spectrometer in the 1.7 I^¼m range

Assignment of collision-induced four-level double-resonance transitions in the 3I^½3​ ⇐ I^½3​ spectral region of methane

Optical frequency comb Fourier transform spectroscopy of the CH $_{2}$ $^{79}$ Br $^{81}$ Br, CH $_{2}$ $^{79}$ Br $_{2}$ , and CH $_{2}$ $^{81}$ Br $_{2}$ isotopologues in the 1180-1210 cm $^{- 1}$ region

Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm $^{- 1}$ states of ethylene

Measurement and assignment of E-symmetry states in the 6010-6110 cm $^{- 1}$ and 8940-9150 cm $^{- 1}$ ranges of methane using optical frequency comb double-resonance spectroscopy

Combined frequency comb and continuous wave cavity-enhanced optical-optical double-resonance spectrometer in the 1.7 $I^¼$ m range

Assignment of collision-induced four-level double-resonance transitions in the 3 $I^½$ $_{3}$ $\Leftarrow$ $I^½$ $_{3}$ spectral region of methane