TIPTOE I Very broadband time-domain cross-correlator from tunnel ionization

BEAM SHAPING

TIPTOE

General description of TIPTOE

TIPTOE is an acronym for Tunneling Ionization with a Perturbation for the Time-Domain Observation of an Electric field. TIPTOE is a pulse characterization technique in which the extreme nonlinearity of ionization is utilized.

An input laser pulse is split into two pulses, one strong and the other weak. The two laser pulses are focused on a target (typically, air), and ionization yield is measured as a function of time delay between the two pulses. The temporal profile of the input pulse can be found from the modulation of the ionization yield using an appropriate reconstruction algorithm.

Since the TIPTOE method utilizes the extreme nonlinearity of ionization, the technique can be applied in a broad wavelength range. According to computer simulations calculated by solving time-dependent Schrodinger equation, the TIPTOE technique can be applied for a wavelength range longer than 200 nm (and up to 20µm in practice).

The TIPTOE technique can be applied for single-cycle, few-cycle and multi-cycle pulses. The intensity of the input pulse should be high enough to ionize the target.

Tiptoe

TIPTOE is an acronym for Tunneling Ionization with a Perturbation for the Time-Domain Observation of an Electric field. TIPTOE is a pulse characterization technique in which the extreme nonlinearity of ionization is utilized.

An input laser pulse is split into two pulses, one strong and the other weak. The two laser pulses are focused on a target (typically, air), and ionization yield is measured as a function of time delay between the two pulses. The temporal profile of the input pulse can be found from the modulation of the ionization yield using an appropriate reconstruction algorithm.

Since the TIPTOE method utilizes the extreme nonlinearity of ionization, the technique can be applied in a broad wavelength range. According to computer simulations calculated by solving time-dependent Schrodinger equation, the TIPTOE technique can be applied for a wavelength range longer than 200 nm (and up to 20µm in practice).

The TIPTOE technique can be applied for single-cycle, few-cycle and multi-cycle pulses. The intensity of the input pulse should be high enough to ionize the target.

TIPTOE


TIPTOE measurement of a single-cycle laser pulse


Performances:

Developed by CoReLS lab (Korea) and SourceLAB, the SL-TIPTOE system is an advanced crosscorrelator, patented by the Institute for Basic Science (IBS – Korea), to reconstruct the short pulse electric field in the time-domain. The following datasheet lists the SL-TIPTOE specifications.

Pulse duration: 0.5 fs – 2 ps
– The lower limit (0.5 fs) is set by the wavelength range specified below .
– The upper limit is set by the travel range of the piezo. It can be changed to longer travel range on request.

Wavelength range: 200 nm – ∞
– The lower limit (200 nm) is set by the ionization energy of air molecules (O2).
– The upper limit is often set by the required pulse energy .
– Experimentally tested for 266 nm – 10 um (in W. Cho et al., Sci Rep, 2019)

Pulse energy required: Approximately 2 uJ @ 400 nm, 10 uJ @ 800 nm, and 60 uJ @ 10 um for a pulse duration up to 50 fs
– More energy is required for a longer pulse

Dispersion range: The pulse duration should be shorter than three times of the transformlimited pulse duration for an accurate measurement.

Dimensions: 146 mm (W) x 310 mm (D) x 83 mm (H)

Min. input beam height: 2.5 inch

Numerical aperture (w/o reimaging system): 5 – 10 mm

Rep rate: 10 Hz or higher recommended

Data acquisition time: 2-10 s @ 1kHz rep. rate, 10-100 s @ 10 Hz rep rate

Output file format: Text (ascii) file (raw data and reconstruction result), jpeg (screen shot)

Output file size: ~100 kbytes

Data processing time: 1 – 20 s

Computer requirements: Quad core CPU, 8 GB memory, 15 inch screen with 1920×1080 resolution (provided with the instrument)

Vacuum compatibility: On request
– Possible if an ionization gas is supplied by a gas jet or the base pressure is high enough to detect ionization (a few torr).

No download available.

+ Overview

General description of TIPTOE

TIPTOE is an acronym for Tunneling Ionization with a Perturbation for the Time-Domain Observation of an Electric field. TIPTOE is a pulse characterization technique in which the extreme nonlinearity of ionization is utilized.

An input laser pulse is split into two pulses, one strong and the other weak. The two laser pulses are focused on a target (typically, air), and ionization yield is measured as a function of time delay between the two pulses. The temporal profile of the input pulse can be found from the modulation of the ionization yield using an appropriate reconstruction algorithm.

Since the TIPTOE method utilizes the extreme nonlinearity of ionization, the technique can be applied in a broad wavelength range. According to computer simulations calculated by solving time-dependent Schrodinger equation, the TIPTOE technique can be applied for a wavelength range longer than 200 nm (and up to 20µm in practice).

The TIPTOE technique can be applied for single-cycle, few-cycle and multi-cycle pulses. The intensity of the input pulse should be high enough to ionize the target.

Tiptoe

TIPTOE is an acronym for Tunneling Ionization with a Perturbation for the Time-Domain Observation of an Electric field. TIPTOE is a pulse characterization technique in which the extreme nonlinearity of ionization is utilized.

An input laser pulse is split into two pulses, one strong and the other weak. The two laser pulses are focused on a target (typically, air), and ionization yield is measured as a function of time delay between the two pulses. The temporal profile of the input pulse can be found from the modulation of the ionization yield using an appropriate reconstruction algorithm.

Since the TIPTOE method utilizes the extreme nonlinearity of ionization, the technique can be applied in a broad wavelength range. According to computer simulations calculated by solving time-dependent Schrodinger equation, the TIPTOE technique can be applied for a wavelength range longer than 200 nm (and up to 20µm in practice).

The TIPTOE technique can be applied for single-cycle, few-cycle and multi-cycle pulses. The intensity of the input pulse should be high enough to ionize the target.

TIPTOE


TIPTOE measurement of a single-cycle laser pulse

+ Specifications


Performances:

Developed by CoReLS lab (Korea) and SourceLAB, the SL-TIPTOE system is an advanced crosscorrelator, patented by the Institute for Basic Science (IBS – Korea), to reconstruct the short pulse electric field in the time-domain. The following datasheet lists the SL-TIPTOE specifications.

Pulse duration: 0.5 fs – 2 ps
– The lower limit (0.5 fs) is set by the wavelength range specified below .
– The upper limit is set by the travel range of the piezo. It can be changed to longer travel range on request.

Wavelength range: 200 nm – ∞
– The lower limit (200 nm) is set by the ionization energy of air molecules (O2).
– The upper limit is often set by the required pulse energy .
– Experimentally tested for 266 nm – 10 um (in W. Cho et al., Sci Rep, 2019)

Pulse energy required: Approximately 2 uJ @ 400 nm, 10 uJ @ 800 nm, and 60 uJ @ 10 um for a pulse duration up to 50 fs
– More energy is required for a longer pulse

Dispersion range: The pulse duration should be shorter than three times of the transformlimited pulse duration for an accurate measurement.

Dimensions: 146 mm (W) x 310 mm (D) x 83 mm (H)

Min. input beam height: 2.5 inch

Numerical aperture (w/o reimaging system): 5 – 10 mm

Rep rate: 10 Hz or higher recommended

Data acquisition time: 2-10 s @ 1kHz rep. rate, 10-100 s @ 10 Hz rep rate

Output file format: Text (ascii) file (raw data and reconstruction result), jpeg (screen shot)

Output file size: ~100 kbytes

Data processing time: 1 – 20 s

Computer requirements: Quad core CPU, 8 GB memory, 15 inch screen with 1920×1080 resolution (provided with the instrument)

Vacuum compatibility: On request
– Possible if an ionization gas is supplied by a gas jet or the base pressure is high enough to detect ionization (a few torr).

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+ Publications