Ponències/Comunicacions de congressoshttp://hdl.handle.net/2117/237912024-03-29T10:32:43Z2024-03-29T10:32:43ZFemtosecond deep-infrared optical parametric oscillator pumped directly by a Ti:sapphire laserO’Donnell, Callum F.Chaitanya Kumar, S.Zawilski, Kevin T.Schunemann, Peter G.Ebrahim-Zadeh, Majidhttp://hdl.handle.net/2117/1299232020-07-23T23:31:56Z2019-02-27T16:51:23ZFemtosecond deep-infrared optical parametric oscillator pumped directly by a Ti:sapphire laser
O’Donnell, Callum F.; Chaitanya Kumar, S.; Zawilski, Kevin T.; Schunemann, Peter G.; Ebrahim-Zadeh, Majid
We report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the nonlinear optical crystal, CdSiP2 (CSP), pumped directly by a Ti:sapphire laser, for the first time. By pumping CSP at <1 μm, we have achieved practical output powers at the longest wavelengths generated by any Ti:sapphire-pumped OPO. Using a combination of pump wavelength tuning, type-I critical phase-matching, and cavity delay tuning, we have generated continuously tunable radiation across 6654−8373 nm (1194−1503 cm-1) at 80.5 MHz repetition rate, providing up to 20 mW of average power at 7314 nm and <7 mW beyond 8000 nm, with idler spectra exhibiting bandwidths of 140−180 nm across the tuning range. Moreover, the near-IR signal is tunable across 1127−1192 nm, providing up to 37 mW of average power at 1150 nm. Signal pulses, characterised using intensity autocorrelation, have durations of ∼260–320 fs, with corresponding time-bandwidth product of ∆υ∆τ∼1. The idler and signal output exhibit a TEM00 spatial profile with single-peak Gaussian distribution. With an equivalent spectral brightness of ∼6.68×1020 photons s-1 mm-2 sr-1 0.1% BW-1, this OPO represents a viable table-top alternative to synchrotron and supercontinuum sources for deep-IR applications in spectroscopy, metrology and medical diagnostics.
2019-02-27T16:51:23ZO’Donnell, Callum F.Chaitanya Kumar, S.Zawilski, Kevin T.Schunemann, Peter G.Ebrahim-Zadeh, MajidWe report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the nonlinear optical crystal, CdSiP2 (CSP), pumped directly by a Ti:sapphire laser, for the first time. By pumping CSP at <1 μm, we have achieved practical output powers at the longest wavelengths generated by any Ti:sapphire-pumped OPO. Using a combination of pump wavelength tuning, type-I critical phase-matching, and cavity delay tuning, we have generated continuously tunable radiation across 6654−8373 nm (1194−1503 cm-1) at 80.5 MHz repetition rate, providing up to 20 mW of average power at 7314 nm and <7 mW beyond 8000 nm, with idler spectra exhibiting bandwidths of 140−180 nm across the tuning range. Moreover, the near-IR signal is tunable across 1127−1192 nm, providing up to 37 mW of average power at 1150 nm. Signal pulses, characterised using intensity autocorrelation, have durations of ∼260–320 fs, with corresponding time-bandwidth product of ∆υ∆τ∼1. The idler and signal output exhibit a TEM00 spatial profile with single-peak Gaussian distribution. With an equivalent spectral brightness of ∼6.68×1020 photons s-1 mm-2 sr-1 0.1% BW-1, this OPO represents a viable table-top alternative to synchrotron and supercontinuum sources for deep-IR applications in spectroscopy, metrology and medical diagnostics.Single-Stage Ti:sapphire-Pumped Deep-Infrared Femtosecond Optical Parametric Oscillator based on CdSiP2O´Donnell, CallumChaitanya Kumar, S.Schunemann, P. G.Zawilski, Kevin T.Ebrahim-Zadeh, Majidhttp://hdl.handle.net/2117/1299102022-05-02T09:32:20Z2019-02-27T16:35:59ZSingle-Stage Ti:sapphire-Pumped Deep-Infrared Femtosecond Optical Parametric Oscillator based on CdSiP2
O´Donnell, Callum; Chaitanya Kumar, S.; Schunemann, P. G.; Zawilski, Kevin T.; Ebrahim-Zadeh, Majid
We report the first deep-infrared femtosecond OPO based on CdSiP2 synchronously-pumped directly by a KLM Ti:sapphire laser, tunable across 7508-8210 nm, and generating as much as 12 mW at 7508 nm in good beam-quality.
2019-02-27T16:35:59ZO´Donnell, CallumChaitanya Kumar, S.Schunemann, P. G.Zawilski, Kevin T.Ebrahim-Zadeh, MajidWe report the first deep-infrared femtosecond OPO based on CdSiP2 synchronously-pumped directly by a KLM Ti:sapphire laser, tunable across 7508-8210 nm, and generating as much as 12 mW at 7508 nm in good beam-quality.Single-Stage Ti:sapphire-Pumped Deep-Infrared Femtosecond Optical Parametric Oscillator based on CdSiP2O’Donnell, Callum F.Chaitanya Kumar, S.Schunemann, P. G.Zawilski, Kevin T.Ebrahim-Zadeh, Majidhttp://hdl.handle.net/2117/1299092022-05-02T09:32:34Z2019-02-27T16:13:29ZSingle-Stage Ti:sapphire-Pumped Deep-Infrared Femtosecond Optical Parametric Oscillator based on CdSiP2
O’Donnell, Callum F.; Chaitanya Kumar, S.; Schunemann, P. G.; Zawilski, Kevin T.; Ebrahim-Zadeh, Majid
We report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the nonlinear optical crystal, CdSiP 2 (CSP), pumped directly by a Ti:sapphire laser, for the first time. By pumping CSP at <;1 μm, we have achieved practical output powers at the longest wavelengths generated by any Ti:sapphire-pumped OPO. Using a combination of pump wavelength tuning, type-I critical phase matching, and cavity delay tuning, we have generated continuously tunable radiation across 6654-8373 nm (1194-1503 cm -1 ) at 80.5-MHz repetition rate, providing up to 20 mW of average power at 7314 nm and >7 mW beyond 8000 nm, with idler spectra exhibiting bandwidths of 140-180 nm across the tuning range. Moreover, the near-IR signal is tunable across 1127-1192 nm, providing up to 37 mW of average power at 1150 nm. Signal pulses, characterized using intensity autocorrelation, have durations of ~260-320 fs, with corresponding time-bandwidth product of ΔυΔτ ~ 1. The idler and signal output exhibit a TEM00 spatial profile with single-peak Gaussian distribution. With an equivalent spectral brightness of ~6.68 × 10 20 photons s -1 mm -2 sr -1 0.1% BW -1 , this OPO represents a viable alternative to synchrotron and supercontinuum sources for deep-IR applications in spectroscopy, metrology, and medical diagnostics.
2019-02-27T16:13:29ZO’Donnell, Callum F.Chaitanya Kumar, S.Schunemann, P. G.Zawilski, Kevin T.Ebrahim-Zadeh, MajidWe report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the nonlinear optical crystal, CdSiP 2 (CSP), pumped directly by a Ti:sapphire laser, for the first time. By pumping CSP at <;1 μm, we have achieved practical output powers at the longest wavelengths generated by any Ti:sapphire-pumped OPO. Using a combination of pump wavelength tuning, type-I critical phase matching, and cavity delay tuning, we have generated continuously tunable radiation across 6654-8373 nm (1194-1503 cm -1 ) at 80.5-MHz repetition rate, providing up to 20 mW of average power at 7314 nm and >7 mW beyond 8000 nm, with idler spectra exhibiting bandwidths of 140-180 nm across the tuning range. Moreover, the near-IR signal is tunable across 1127-1192 nm, providing up to 37 mW of average power at 1150 nm. Signal pulses, characterized using intensity autocorrelation, have durations of ~260-320 fs, with corresponding time-bandwidth product of ΔυΔτ ~ 1. The idler and signal output exhibit a TEM00 spatial profile with single-peak Gaussian distribution. With an equivalent spectral brightness of ~6.68 × 10 20 photons s -1 mm -2 sr -1 0.1% BW -1 , this OPO represents a viable alternative to synchrotron and supercontinuum sources for deep-IR applications in spectroscopy, metrology, and medical diagnostics.Performance characterization of midinfrared difference frequency generation in orientation-patterned gallium phosphideWei, JunxiongChaitanya Kumar, S.Hanyu, YeSchunemann, Peter G.Ebrahim-Zadeh, Majidhttp://hdl.handle.net/2117/1299072020-10-15T07:31:10Z2019-02-27T15:52:54ZPerformance characterization of midinfrared difference frequency generation in orientation-patterned gallium phosphide
Wei, Junxiong; Chaitanya Kumar, S.; Hanyu, Ye; Schunemann, Peter G.; Ebrahim-Zadeh, Majid
Orientation-patterned gallium phosphide (OP-GaP) is a recently developed nonlinear material with wide transparency across 0.8-12 μm and high nonlinearity (d14∼70 pm/V), which is a promising candidate material for mid-infrared generation. Here we report the full performance characterization of a tunable single-pass nanosecond difference frequency generation (DFG) source based on OP-GaP by mixing the output of a Q-switched Nd:YAG laser at 1.064 μm with the signal from a pulsed MgO:PPLN OPO pumped by the same laser. Using the longest OP-GaP crystal (40 mm) deployed to date, the DFG source provides up to ∼14 mW of average output power at 2719 nm at 80 kHz repetition rate, with >6 mW across 2492-2782 nm, in TEM00 spatial profile. By performing relevant measurements, detrimental issues such as residual absorption and thermal effects have been studied and confirmed. The temperature and spectral acceptance bandwidths for DFG in the 40-mm-log OP-GaP are measured to be 18 °C and 17 nm, respectively, at 1766 nm. The DFG beam exhibits passive power stability better than 1.7% rms over 1.4 hours at 2774 nm, compared to 1.6% and 0.1% rms for the signal and pump, respectively. The polarization dependence of the input beams on the DFG power has also been systematically investigated, for the first time to our knowledge. Further, we have measured the damage threshold of the OP-GaP crystal to be 0.8 J/cm2 at 1064 nm.
2019-02-27T15:52:54ZWei, JunxiongChaitanya Kumar, S.Hanyu, YeSchunemann, Peter G.Ebrahim-Zadeh, MajidOrientation-patterned gallium phosphide (OP-GaP) is a recently developed nonlinear material with wide transparency across 0.8-12 μm and high nonlinearity (d14∼70 pm/V), which is a promising candidate material for mid-infrared generation. Here we report the full performance characterization of a tunable single-pass nanosecond difference frequency generation (DFG) source based on OP-GaP by mixing the output of a Q-switched Nd:YAG laser at 1.064 μm with the signal from a pulsed MgO:PPLN OPO pumped by the same laser. Using the longest OP-GaP crystal (40 mm) deployed to date, the DFG source provides up to ∼14 mW of average output power at 2719 nm at 80 kHz repetition rate, with >6 mW across 2492-2782 nm, in TEM00 spatial profile. By performing relevant measurements, detrimental issues such as residual absorption and thermal effects have been studied and confirmed. The temperature and spectral acceptance bandwidths for DFG in the 40-mm-log OP-GaP are measured to be 18 °C and 17 nm, respectively, at 1766 nm. The DFG beam exhibits passive power stability better than 1.7% rms over 1.4 hours at 2774 nm, compared to 1.6% and 0.1% rms for the signal and pump, respectively. The polarization dependence of the input beams on the DFG power has also been systematically investigated, for the first time to our knowledge. Further, we have measured the damage threshold of the OP-GaP crystal to be 0.8 J/cm2 at 1064 nm.Stable, High-Average-Power, Degenerate Optical Parametric Oscillator at 2.1 μmYe, HanyuNandy, Biplob KumarChaitanya Kumar, S.Ebrahim-Zadeh, Majidhttp://hdl.handle.net/2117/1299032022-06-14T12:54:41Z2019-02-27T15:34:36ZStable, High-Average-Power, Degenerate Optical Parametric Oscillator at 2.1 μm
Ye, Hanyu; Nandy, Biplob Kumar; Chaitanya Kumar, S.; Ebrahim-Zadeh, Majid
We describe a degenerate 1.064-μm-pumped pulsed optical parametric oscillator based on MgO:PPLN in compact Littrow-grating cavity configuration, providing 2.7W of average power at 2.1μm with high spectral and power stability in good spatial beam quality.
2019-02-27T15:34:36ZYe, HanyuNandy, Biplob KumarChaitanya Kumar, S.Ebrahim-Zadeh, MajidWe describe a degenerate 1.064-μm-pumped pulsed optical parametric oscillator based on MgO:PPLN in compact Littrow-grating cavity configuration, providing 2.7W of average power at 2.1μm with high spectral and power stability in good spatial beam quality.Optical parametric generator based on orientation-patterned gallium phosphideYe, HanyuChaitanya Kumar, S.Wei, JunxiongSchunemann, P. G.Ebrahim-Zadeh, Majidhttp://hdl.handle.net/2117/1298872020-07-23T23:31:56Z2019-02-27T12:56:45ZOptical parametric generator based on orientation-patterned gallium phosphide
Ye, Hanyu; Chaitanya Kumar, S.; Wei, Junxiong; Schunemann, P. G.; Ebrahim-Zadeh, Majid
We report the first pulsed optical parametric generator based on Orientation-patterned Gallium Phosphide. The output is tunable from 1721-1850 nm (signal) and 2504-2787 nm (idler), providing a total output power of 18 mW.
2019-02-27T12:56:45ZYe, HanyuChaitanya Kumar, S.Wei, JunxiongSchunemann, P. G.Ebrahim-Zadeh, MajidWe report the first pulsed optical parametric generator based on Orientation-patterned Gallium Phosphide. The output is tunable from 1721-1850 nm (signal) and 2504-2787 nm (idler), providing a total output power of 18 mW.Singly-Resonant Optical Parametric Oscillator Based on Orientation-Patterned Gallium PhosphideYe, HanyuChaitanya Kumar, S.Wei, JunxiongSchunemann, P. G.Ebrahim-Zadeh, Majidhttp://hdl.handle.net/2117/1174222022-05-17T10:53:24Z2018-05-23T11:45:38ZSingly-Resonant Optical Parametric Oscillator Based on Orientation-Patterned Gallium Phosphide
Ye, Hanyu; Chaitanya Kumar, S.; Wei, Junxiong; Schunemann, P. G.; Ebrahim-Zadeh, Majid
We report a pulsed singly-resonant optical parametric oscillator based on orientation-patterned gallium phosphide pumped by a Q-switched Nd:YAG laser. The mid-IR idler can be tuned across 2.8-3.1 μm with an average power of 20 mW.
2018-05-23T11:45:38ZYe, HanyuChaitanya Kumar, S.Wei, JunxiongSchunemann, P. G.Ebrahim-Zadeh, MajidWe report a pulsed singly-resonant optical parametric oscillator based on orientation-patterned gallium phosphide pumped by a Q-switched Nd:YAG laser. The mid-IR idler can be tuned across 2.8-3.1 μm with an average power of 20 mW.