8 research outputs found
Two-crystal, synchronously pumped, femtosecond optical parametric oscillator
We demonstrate a femtosecond optical parametric oscillator based on two nonlinear crystals synchronously
pumped by a single ultrafast laser for efficient intracavity signal amplification and output power enhancement.
By deploying two identical MgO:PPLN crystals in a single standing-wave cavity, and two pump pulse trains of
similar average power from the same Kerr-lens-mode-locked Ti:sapphire laser, a minimum enhancement of
56% in the extracted signal power is achieved, with un-optimized output coupling, when temporal synchronization
between the two intracavity signal pulse trains is established, resulting in a corresponding enhancement of 49% in
pump depletion. Using intracavity dispersion control, near-transform-limited signal pulses with clean spectrum are
obtainedPeer ReviewedPreprin
Ti:sapphire-pumped deep-infrared femtosecond optical parametric oscillator based on CdSiP2
We report on a femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the Kerr-lens-mode-locked Ti:sapphire laser as the pump source. By deploying a novel cascaded intracavity arrangement, comprising a femtosecond OPO based on the nonlinear crystal, CdSiP2CdSiP2, synchronously pumped internal to a MgO:PPLN femtosecond OPO, we have generated broadly tunable radiation across 5958–8117 nm using rapid static cavity delay tuning, with a maximum power of 64 μW at 6791 nm, limited by the absorption in mirror substrates as well as polarization-dependent intracavity losses. The deep-IR idler power exhibits excellent passive stability of better than 1.1% rms over 2 h, with a spectral bandwidth as large as ∼650  nm∼650  nm at ∼6800  nm∼6800  nm. The demonstrated concept is generic and can be similarly deployed in other operating time scales and wavelength regions, also using different laser pump sources and nonlinear materials.Peer ReviewedPostprint (author's final draft
Two-crystal, synchronously pumped, femtosecond optical parametric oscillator
We demonstrate a femtosecond optical parametric oscillator based on two nonlinear crystals synchronously
pumped by a single ultrafast laser for efficient intracavity signal amplification and output power enhancement.
By deploying two identical MgO:PPLN crystals in a single standing-wave cavity, and two pump pulse trains of
similar average power from the same Kerr-lens-mode-locked Ti:sapphire laser, a minimum enhancement of
56% in the extracted signal power is achieved, with un-optimized output coupling, when temporal synchronization
between the two intracavity signal pulse trains is established, resulting in a corresponding enhancement of 49% in
pump depletion. Using intracavity dispersion control, near-transform-limited signal pulses with clean spectrum are
obtainedPeer Reviewe
Two-crystal, synchronously pumped, femtosecond optical parametric oscillator
We demonstrate a femtosecond optical parametric oscillator based on two nonlinear crystals synchronously
pumped by a single ultrafast laser for efficient intracavity signal amplification and output power enhancement.
By deploying two identical MgO:PPLN crystals in a single standing-wave cavity, and two pump pulse trains of
similar average power from the same Kerr-lens-mode-locked Ti:sapphire laser, a minimum enhancement of
56% in the extracted signal power is achieved, with un-optimized output coupling, when temporal synchronization
between the two intracavity signal pulse trains is established, resulting in a corresponding enhancement of 49% in
pump depletion. Using intracavity dispersion control, near-transform-limited signal pulses with clean spectrum are
obtainedPeer Reviewe
Ti:sapphire-pumped deep-infrared femtosecond optical parametric oscillator based on CdSiP2
We report on a femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the Kerr-lens-mode-locked Ti:sapphire laser as the pump source. By deploying a novel cascaded intracavity arrangement, comprising a femtosecond OPO based on the nonlinear crystal, CdSiP2CdSiP2, synchronously pumped internal to a MgO:PPLN femtosecond OPO, we have generated broadly tunable radiation across 5958–8117 nm using rapid static cavity delay tuning, with a maximum power of 64 μW at 6791 nm, limited by the absorption in mirror substrates as well as polarization-dependent intracavity losses. The deep-IR idler power exhibits excellent passive stability of better than 1.1% rms over 2 h, with a spectral bandwidth as large as ∼650  nm∼650  nm at ∼6800  nm∼6800  nm. The demonstrated concept is generic and can be similarly deployed in other operating time scales and wavelength regions, also using different laser pump sources and nonlinear materials.Peer Reviewe
Ti:sapphire-pumped deep-infrared femtosecond optical parametric oscillator based on CdSiP2
We report on a femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the Kerr-lens-mode-locked Ti:sapphire laser as the pump source. By deploying a novel cascaded intracavity arrangement, comprising a femtosecond OPO based on the nonlinear crystal, CdSiP2CdSiP2, synchronously pumped internal to a MgO:PPLN femtosecond OPO, we have generated broadly tunable radiation across 5958–8117 nm using rapid static cavity delay tuning, with a maximum power of 64 μW at 6791 nm, limited by the absorption in mirror substrates as well as polarization-dependent intracavity losses. The deep-IR idler power exhibits excellent passive stability of better than 1.1% rms over 2 h, with a spectral bandwidth as large as ∼650  nm∼650  nm at ∼6800  nm∼6800  nm. The demonstrated concept is generic and can be similarly deployed in other operating time scales and wavelength regions, also using different laser pump sources and nonlinear materials.Peer Reviewe
A Highly Sensitive Pyroresistive All-Organic Infrared Bolometer
In this paper, we report bilayer (BL) composite films, composed of a polymeric matrix with a top layer formed by a crystalline network of a conducting molecular ion-radical salt (IRS), as materials able to sense, reversibly and fast, very small changes of temperature of objects both in a direct-contact and in a contact-less manner, due to the pyroresistive properties of the molecular conductor and the low mass/heat-capacitance of the composite fi lms. Such BL fi lms have a sensitivity one order of-magnitude larger than most commonly used metal or metalalloy based temperature sensors, combining the flexibility, lightweight, and easy processing properties of polymers