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Pulse Diagnostics

The FSAC Interferometric Autocorrelator is designed for accurate pulse width characterization of femtosecond lasers in the 650-1100 nm wavelength range. This compact, user-friendly device provides pulse width measurements from 50 fs to 10 ps, with a selectable gain up to 70 dB to accommodate a wide range of input powers. Ideal for ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 15 – 1000 fs
Wavelength Range: 650 – 1100 nm
Input Polarization: Horizontal
Scan Range: 50 - 10,000 fs
ROC stands for Row Optical Correlator. Based on a compact and robust inline setup, the ROC allows the measurement of single-shot autocorrelation traces. Specifically designed to offer the easiest user experience, they cannot be misaligned and no calibration or tweaking is needed. Additionally, they are easily transportable. And yes, ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 5 – 10 fs
Wavelength Range: 480 – 2100 nm
Input Polarization: Vertical
The Blueback Spider sets a new standard in real-time ultrashort laser pulse characterization, offering precise measurements crucial for ultrafast oscillators and amplifiers. Engineered with meticulous attention to detail, it provides high-resolution data, empowering users across industries, scientific research, and medical fields ...

Specifications

Device Type: SPIDER
Measurable Pulse Width: 80 – 4000 fs
Wavelength Range: 1010 – 1060 nm
Input Polarization: Vertical
Repetition Rate: 1-200000 kHz
peakDetect is ideal for verifying the performance of ultrashort pulse lasers - especially when focusing on peak power sensitive applications and integrated systems for microscopy, micro-machining, medical diagnostics, or surgery. peakDetect is designed to provide a simple and cost effective way of verifying the ...

Specifications

Device Type: Peak Power Indicator
Measurable Pulse Width: 100 – 5000 fs
Wavelength Range: 700 – 1100 nm
Input Polarization: Any
Repetition Rate: 1 – 1000 kHz
APE\'s Carpe is a handy option for reviewing the management of short laser pulses in an optical microscope system. The Carpe autocorrelator measures the pulse duration at both the sample location and the input of the microscope. A comparison of the pulse widths obtained at these two spots enables you to calculate the pulse ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 50 – 30 fs
Wavelength Range: 700 – 2000 nm
Input Polarization: Horizontal
The FC Spider (Few Cycle Spider) by APE provides spectral and temporal characterization of ultrashort laser pulses down to below 5 fs. It covers both the red and near infrared range, and visible wavelength region with the FC Spider VIS. This high-precision tool is ideal for aligning and monitoring the performance of broadband ...

Specifications

Device Type: SPIDER
Measurable Pulse Width: 10 – 150 fs
Wavelength Range: 450 – 900 nm
Input Polarization: Horizontal
The Mini TPA by APE is the perfect combination of tuning-free autocorrelation measurement, compact size and high sensitivity.  Conventionally, autocorrelators used to split an optical pulse into two replicas and recombine them for the Second Harmonic Generation (SHG) in a nonlinear crystal. The APE Mini TPA instead benefits from ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 50 – 30 fs
Wavelength Range: 340 – 3200 nm
Input Polarization: Horizontal, Vertical
It is good to have plenty of options at hand. Suitable for the characterization of virtually any ultrafast pulsed laser, the pulseCheck autocorrelator from APE covers the broadest possible range of wavelengths and pulse widths. This flexibility is achieved by using exchangeable Optics Sets, typically consisting of a nonlinear crystal ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 10 – 500 fs
Wavelength Range: 200 – 12000 nm
Input Polarization: Horizontal, Vertical
Second Harmonic Generation FROG is the most popular spectrometer-less Frequency Resolved Optical Gating method. The pulseCheck autocorrelators by APE optionally integrate FROG, giving access to complete pulse characterization. The addition of a special nonlinear crystal module and dedicated software opens the door to complete ...

Specifications

Device Type: FROG
Measurable Pulse Width: 200 – 6000 fs
Wavelength Range: 420 – 2200 nm
Input Polarization: Any
The Spider IR is a precision tool optimized for the complete spectral and temporal characterization of laser pulses in the infrared. Based on the patented Spider* technology, it extends the existing range of APE Spider models to cover longer pulses, between 30 and 500 fs, at a central wavelength of around 1 μm. It also ...

Specifications

Device Type: SPIDER
Measurable Pulse Width: 30 – 500 fs
Wavelength Range: 970 – 1070 nm
Input Polarization: Horizontal
The d-shot is a compact system for ultrafast laser pulses single shot measurement with spectrum supporting 10-50 fs and at repetition rates ranging from sub-Hz to hundreds of kHz or MHz. Coupling the laser beam into the d-shot is easily achieved in less than five minutes, and a full measurement (including retrieval) usually takes ...

Specifications

Device Type: d-scan
Measurable Pulse Width: 10 – 70 fs
Wavelength Range: 700 – 1050 nm
Input Polarization: Horizontal
Chirp Range: ±1500 fs2
The d-cycle is the system of choice for fast and accurate measurement of even the most demanding ultrafast pulses, down to ultra-broadband spectra and single-cycle durations – the shortest for any commercially available device. Its versatile and standalone architecture handles a variety of state-of-the-art ultrashort pulse ...

Specifications

Device Type: d-scan
Measurable Pulse Width: 2.5 – 60 fs
Wavelength Range: 450 – 1200 nm
Input Polarization: Horizontal
Chirp Range: +/- 700 fs2
THE ULTIMATE MEASUREMENT AND CONTROL TOOL FOR ULTRAFAST LASER SYSTEMSAND HOLLOW-FIBER COMPRESSORS d-scan is an inline, compact and high-performance device for the simultaneous measurement and compression of even the most demanding ultrafast pulses. d-scan can be used either as a standalone system or integrated with existing optical ...

Specifications

Device Type: d-scan
Measurable Pulse Width: 2.5 – 60 fs
Wavelength Range: 450 – 1200 nm
Input Polarization: Horizontal
Chirp Range: ±720 fs2
The FC Spider (Few Cycle Spider) by APE provides spectral and temporal characterization of ultrashort laser pulses down to below 5 fs. It covers both the red and near infrared range, and visible wavelength region with the FC Spider VIS. This high-precision tool is ideal for aligning and monitoring the performance of broadband ...

Specifications

Device Type: SPIDER
Measurable Pulse Width: 5 – 200 fs
Wavelength Range: 550 – 1050 nm
Input Polarization: Horizontal
The new third-order cross-correlator specifically developed for measuring a wide array of output parameters from ultrafast laser system including: contrast ratio of laser pulses, determining pulse pedestal, pre-, post-pulses, and amplified spontaneous emission in femtosecond systems. It also provides information about the third-order ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 20 – 1000 fs
Wavelength Range: 700 – 1500 nm
Input Polarization: Horizontal
Temporal Range: 950 ps
How  good  is  the  output  from  your  femtosecond laser? The  new  third-order  cross-correlator  was specifically  developed  for  measuring  a  wide  array of output parameters from ultrafast laser systems including: contrast ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 20 – 20000 fs
Wavelength Range: 800 – 1250 nm
Input Polarization: Horizontal
Input Pulse Repetition Rate: < 3 kHz
The IRA-3-10 autocorrelator is specifically  developed for measuring pulse duration and near contrast ratio of IR ultrafast radiation (wavelength 3–10 μm) that is usually generated by the ultrafast OPAs.The IRA includes optomechanical  assembly and electronics with USB interface. System is easy to ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 30 – 50000 fs
Wavelength Range: 3000 – 10000 nm
Input Polarization: Horizontal, Vertical
Input Pulse Energy, μJ: < 10 uJ
The Reef-RTD real-time autocorrelator offers smooth and fast measurement of femtosecond and picosecond pulse duration. Different models of the autocorrelator cover several wavelength ranges, with the Reef-RTDM model combining the ranges by using 3 interchangeable photodetectors and optics. Two separate ranges can also be covered upon ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 10 – 6000 fs
Wavelength Range: 1300 – 2000 nm
Input Polarization: Horizontal, Vertical
PC Connection: USB
The Reef-RTD real-time autocorrelator offers smooth and fast measurement of femtosecond and picosecond pulse duration. Different models of the autocorrelator cover several wavelength ranges, with the Reef-RTDM model combining the ranges by using 3 interchangeable photodetectors and optics. Two separate ranges can also be covered upon ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 10 – 6000 fs
Wavelength Range: 450 – 2000 nm
Input Polarization: Horizontal
PC Connection: USB
REEF scanning autocorrelator by Del Mar Photonics. The Reef-RTD real-time autocorrelator offers smooth and fast measurement of femtosecond and picosecond pulse duration. Different models of the autocorrelator cover several wavelength ranges, with the Reef-RTDM model combining the ranges by using 3 interchangeable photodetectors and ...

Specifications

Device Type: Autocorrelator
Measurable Pulse Width: 10 – 6000 fs
Wavelength Range: 450 – 2000 nm
Input Polarization: Horizontal, Vertical
Input Repetition Rate: 8 kHz

Ultrafast Laser Pulse Diagnostics: Precision Tools for Measuring the Fastest Light

Ultrafast laser pulse diagnostics are essential for characterizing light pulses with durations ranging from femtoseconds (10⁻¹⁵ seconds) to picoseconds (10⁻¹² seconds). These diagnostics provide critical information about pulse parameters such as duration, shape, phase, and spectral content, which are vital for applications in ultrafast spectroscopy, nonlinear optics, and high-precision material processing.

Key Diagnostic Techniques

  1. Autocorrelation: This technique measures pulse duration by splitting a pulse into two replicas, delaying one relative to the other, and recombining them in a nonlinear medium. The resulting signal provides an estimate of the pulse width. Autocorrelators are widely used due to their simplicity and effectiveness in measuring pulses from a few femtoseconds to several picoseconds.

  2. Frequency-Resolved Optical Gating (FROG): FROG captures both the intensity and phase information of a pulse by measuring a spectrally resolved autocorrelation signal. This allows for complete reconstruction of the pulse's electric field, providing detailed insights into its temporal and spectral characteristics.

  3. Spectral Phase Interferometry for Direct Electric-field Reconstruction (SPIDER): SPIDER uses spectral shearing interferometry to retrieve the spectral phase of ultrashort pulses. By analyzing the interference between spectrally shifted replicas of the pulse, SPIDER enables precise reconstruction of the pulse's electric field.

  4. Multiphoton Intrapulse Interference Phase Scan (MIIPS): MIIPS not only characterizes but also compensates for phase distortions in ultrashort pulses. By applying a known phase modulation and measuring the resulting second-harmonic generation signal, MIIPS can correct for dispersion and optimize pulse compression.

Emerging Techniques

Recent advancements have introduced innovative methods for pulse diagnostics. For instance, single-shot amplitude swing techniques enable the characterization of individual pulses without the need for scanning, which is particularly useful for systems with low repetition rates or fluctuating pulse shapes . Additionally, air-based knife-edge techniques utilize plasma-induced defocusing to characterize pulses in ambient conditions, offering a straightforward and reliable approach.

Applications

Accurate pulse diagnostics are crucial across various fields:

  • Ultrafast Spectroscopy: Understanding molecular dynamics and chemical reactions on ultrafast timescales requires precise knowledge of pulse characteristics.

  • Nonlinear Optics: Processes like harmonic generation and supercontinuum generation depend on well-characterized pulses to achieve desired outcomes.

  • Material Processing: Ultrashort pulses are used for precise micromachining and surface structuring, where pulse duration and shape directly influence the quality of the process.

  • Biomedical Imaging: Techniques such as multiphoton microscopy rely on ultrafast pulses for high-resolution, deep-tissue imaging.

Conclusion

Ultrafast laser pulse diagnostics are indispensable tools for the advancement of science and technology involving ultrashort light pulses. By providing detailed insights into pulse characteristics, these diagnostics enable precise control and optimization of laser systems, facilitating breakthroughs in research and industrial applications.

Did You know?

Laser pulses are some of the shortest events ever created. For some time, it was possible to create ultrafast laser pulses, but not to measure them. Today, powerful tools exist to collect much more accurate information on characteristics such as pulse duration, shape and form, as well as noise level of pulse waves. Laser pulse diagnostic systems, including Spider, FROG and Autocorrelator, are commonly used to characterize the output of ultrafast lasers. These systems help to determine the quality of the output, leading to highly sophisticated semiconductors, electrical circuitry, and even biomedical products.