ROC | Compact Autocorrelator for Ultrafast Laser Pulse Measurement

Time to measurement

<2 min - No calibration needed

Measurement type

Single-shot and Multi-shot

Input pulse energe

from a few pJ to a few mJ

Acceptable average power

Up to 3.5 W

Pulse measurement range

5 fs to 10 ps

Interface

USB3.1 (or GigE)

Autocorrelators are used to measure pulse duration. The basic principle is to create two copies of the incoming beam, with a beam splitter. Those copies are superimposed in a nonlinear medium, where they interact generating a third beam. As the overlap of the two copies depends on the pulse duration, analysing the third beam allows to calculate the pulse duration. The ROC autocorrelator is a single-shot autocorrelator, thus it needs one single pulse to measure the duration. It is very compact and extremly easy to use. Only two minutes are necessary to get the measurement !

ROC stands for Row Optical Correlator. Based on an ultra 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. Also, they are easily transportable. And yes, they are rock-solid! Besides those advantages, the ROC autocorrelators provide excellent technical performances and highly accurate measurements. The ROC autocorrelators are available for different wavelength ranges and several pulse durations.

ROC features include:

Ultra compact
Installation and measurement in less than 2 minutes! No calibration necessary
Suitable for any repetition rate
Single-pulse extraction possible up to 150 kHz laser repetition rate (with Enhanced detection option)
User-friendly and powerful software (STAR : Software Technology for Acquisition and Retrieval)
Input pulse energy from few pJ to few mJ
Acceptable average power up to 3.5 W
Pulse measurement from 5 fs to 10 ps
Broad available spectral range

MS-ROC stands for Multi-Shot Row Optical Correlator. The MS-ROC allows the measurement of autocorrelation traces. It is based on second harmonic generation, making it reliable and compact. It has been specially developed for sources with sub-nJ energy per pulse. It allows the measurement of pulses from 50 fs to 40 ps in the standard version. With its high scan speed, real-time operations is possible for measurement and optimization. The MS-ROC-LP can perform scan at 130 ps/s, making it the fastest scanning autocorrelator on the market. Also, the MS-ROC-SP allows the measurement of both ultra-short and long pulses thanks to its dual-mode (standard mode for pulse duration > 50 fs and fine-scan mode for pulse < 50 fs). Like every products, the MS-ROC is easy to install and use.

MS-ROC features include:

Ultra simple alignment (2 min to setup)
Large pulse duration measurement range (from 5 fs to 80 ps)
High sensitivity (sub-nJ pulse)
User-friendly and powerful software (STAR : Software Technology for Acquisition and retrieval)
Broad available spectral range
Fiber connector available (FC/APC, FC/PC)

Single Shot (ROC)
	FC	FS	PS1	PS3	PS5	PS10
Pulse duration min	5 fs	20 fs	50 fs	70 fs	100 fs	300 fs
Pulse duration max	150 fs	500 fs	1 ps	3 ps	5 ps	10 ps
Accessible spectral range (nm)*	480 - 2100	480 - 2100	480 - 2100	480 - 2100	480 - 2100	800 - 2100
Dimensions (mm)	55 x 56 x 265	55 x 56 x 265	55 x 56 x 195	55 x 56 x 195	55 x 56 x 195	55 x 56 x 195
Input pulse repetition rate**	Single-shot to GHz	Single-shot to GHz	Single-shot to GHz	Single-shot to GHz	Single-shot to GHz	Single-shot to GHz
Single-pulse measurement	Up to40 kHz (150kHz w/ option)	Up to40 kHz (150kHz w/ option)	Up to40 kHz (150kHz w/ option)	Up to40 kHz (150kHz w/ option)	Up to40 kHz (150kHz w/ option)	Up to40 kHz (150kHz w/ option)
Min input pulse energy @ Single-shot	1 µJ	1 µJ	1 µJ	1 µJ	1 µJ	1 µJ
Min input pulse energy @ 40 MHz	300 pJ	300 pJ	300 pJ	300 pJ	300 pJ	300 pJ
Variable ND Filter	yes	yes	yes	yes	yes	yes
Iris Aperture	yes	yes	yes	yes	yes	yes
Input polarization	linear horizontal or vertical	linear horizontal or vertical	linear horizontal or vertical	linear horizontal or vertical	linear horizontal or vertical	linear horizontal or vertical
Detection	CMOS 12 Bits - 3 Mpx - 72 dB	CMOS 12 Bits - 3 Mpx - 72 dB	CMOS 12 Bits - 3 Mpx - 72 dB	CMOS 12 Bits - 3 Mpx - 72 dB	CMOS 12 Bits - 3 Mpx - 72 dB	CMOS 12 Bits - 3 Mpx - 72 dB
PC Interface	USB 3.1	USB 3.1	USB 3.1	USB 3.1	USB 3.1	USB 3.1
Beam height (mm)	Adjustable from 30 mm	Adjustable from 30 mm	Adjustable from 30 mm	Adjustable from 30 mm	Adjustable from 30 mm	Adjustable from 30 mm

MS-ROC (Multi-Shot)
	MS-ROC	MS-ROC-LP	MS-ROC-SP	MS-ROC-SLP
Pulse duration min	10 fs - 50 fs	20 fs	4 fs - 20 fs	4 fs - 20 fs
Pulse duration max	40 ps	80 ps	40 ps	80 ps
Fine scan mode range	N/A	N/A	4 - 100 fs	4 - 100 fs
Accessible spectral range (nm)**	480 - 2200	480 - 2200	480 - 2200	480 - 2200
Minimum temporal resolution	1 fs	2 fs	standard : 1 fs, fine scan : 50 as	standard : 2 fs, fine scan : 50 as
Scan speed	> 65 ps/s	> 130 ps/s	standard : > 130 ps/s fine scan : > 400 fs/s	standard : > 65 ps/s fine scan : > 400 fs/s
Min input pulse energy @ 1 MHz	5 pJ	5 pJ	1 nJ	1 nJ
Min input pulse energy @ 100 MHz	0.5 pJ	0.5 pJ	100 pJ	100 pJ
Input pulse repetition rate	100 Hz to GHz	100 Hz to GHz	100 Hz to GHz	100 Hz to GHz
Input polarization	linear vertical	linear vertical	linear vertical	linear vertical
Detection	CMOS 12 Bits, 3 Mpx, 72 dB	CMOS 12 Bits, 3 Mpx, 72 dB	CMOS 12 Bits, 3 Mpx, 72 dB	CMOS 12 Bits, 3 Mpx, 72 dB
PC Interface	USB 3.1	USB 3.1	USB 3.1	USB 3.1
Beam height (mm)	69 - 148	69 - 148	69 - 148	69 - 148
Dimensions (mm)	222 x 194 x 129	222 x 194 x 129	326 x 194 x 129	326 x 194 x 129

Data Sheet and Brochures

FemtoEasy_ROC_datasheet

FemtoEasy_MSROC_datasheet

The Femto Easy software has been designed to be user friendly and intuitive. This is a modern software compatible with touchscreen that can run either under Linux or Windows. It allows distant control of the devices via PC, tablet or smartphone. We can also provide custom software developments upon request.

Enhanced detection	Replacement of the default camera embedded in the ROC by a higher performance one to increase the specifications of the system (better temporal resolution, single-shot extraction up to 150 kHz)
Fiber input connector	Plug&play collimation module with fiber connector. Can be mounted on the ROC to easily switch the input from free-space to fiber. No alignment required.
High dynamic range	Software mode to increase the dynamic of the ROC signal acquisition from 12 to 16 bits. Not compatible with pure single-shot measurement as 2 images are necessary to build one autocorrelation trace
Low energy	Internal or external module (depending on ROC model) to increase the sensitivity of the device when the laser power is too weak
Phase matching	Default ROC configuration works for a given central wavelength. Phase matching allows tuning the SHG crystal to measure different central wavelengths with the best SNR
Small beam	Internal or external module (depending on ROC model) to increase the input beam diameter when it is too small (necessary for beams typically in the range of few mm or less)
Trigger	Synchronization of the ROC detection to an external signal for accurate laser single pulse extraction up to 80 kHz (150 kHz with the Enhanced detection option)
Enhanced detection	Replacement of the default camera embedded in the ROC by a higher performance one to increase the specifications of the system (better temporal resolution, single-shot extraction up to 150 kHz)
Fiber input connector	Plug&play collimation module with fiber connector. Can be mounted on the ROC to easily switch the input from free-space to fiber. No alignment required.
High dynamic range	Software mode to increase the dynamic of the ROC signal acquisition from 12 to 16 bits. Not compatible with pure single-shot measurement as 2 images are necessary to build one autocorrelation trace
Low energy	Internal or external module (depending on ROC model) to increase the sensitivity of the device when the laser power is too weak

Description
Additional information

Ultra-compact/OEM size autocorrelator for ultrafast laser with single-pulse extraction up to 150kHz and pulse width from 5fs to 10ps.

Autocorrelators are used for laser pulse characterization and more precisely to measure the pulse duration for ultrafast lasers. The basic principle is to create two copies of the incoming beam, with a beam splitter. Those copies are superimposed in a nonlinear medium, where they interact generating a third beam. As the overlap of the two copies depends on the pulse duration, analysing the third beam allows to calculate the pulse duration. The ROC autocorrelator is a single-shot autocorrelator, thus it needs one single pulse to measure the duration. It is very compact and extremly easy to use. Only two minutes are necessary to get the measurement !

ROC autocorrelator

ROC stands for Row Optical Correlator. Based on an ultra 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. Also, they are easily transportable. And yes, they are rock-solid! Besides those advantages, the ROC autocorrelators provide excellent technical performances and highly accurate ultrashort laser pulse measurements. The ROC autocorrelators are available for different wavelength ranges and several pulse durations.

Ultra compact, and alignment free, can be used as a simple camera
Robust design, no moving parts. Non sensitive to vibrations
Directly powered by the USB cable, no power supply required
Suitable for any repetition rate. Single-pulse extraction possible up to 100 kHz laser repetition rate
User-friendly and powerful software. REST API for standard software integration using simple HTTP requests

Ultrashort laser pulse measurement

This is an autocorrelation measurement sample of ultrashort pulse that has been performed in Politecnico di Milano with our short pulse model autocorrelator ROC FC. On the top, the raw image of the spatially resolved autocorrelation trace. At the bottom, the analysed autocorrelation trace integrated over the spatial coordinate. The experimental data (in red) are fitted by a Gaussian function (in blue). The full width at half maximum of the autocorrelation trace is 8.3 fs. The corresponding Gaussian pulse duration is 5.9 fs.

Autocorrelator MEASUREMENT OF LOW ENERGY PULSES

This measurement has been performed on a femtosecond Ti:Sapph oscillator at LCAR with a ROC FC autocorrelator. The average power used for the measurement was with only 20 mW at 62 MHz repetition rate. It means that in this conditions 0.3 nJ per pulse was enough to get a clean measurement. At the buttom, the raw image of the spatially resolved autocorrelation trace. On the top, the analysed autocorrelation trace integrated over the spatial coordinate. The experimental data (in blue) are fitted by a Gaussian function (in red). The full width at half maximum of the autocorrelation trace is 30.4 fs for a Gaussian pulse duration of 21.5 fs.

µ-ROC is the smallest autocorrelator for ultrafast lasers on the market.

µROC autocorrelator for ultrafast laser pulse characterization

Text0	Measures pulses from 5 fs to 10 ps
Text1	Ultra compact and alignment free
Text2	No moving parts and insensitive to vibrations
Text3	Single-pulse extraction up to 100 kHz
Text4	USB powered
Text5	User-friendly software

ROC | Compact Autocorrelator for Ultrafast Laser Pulse Measurement

Ultra-compact/OEM size autocorrelator for ultrafast laser with single-pulse extraction up to 150kHz and pulse width from 5fs to 10ps.

ROC autocorrelator

Ultrashort laser pulse measurement

Autocorrelator MEASUREMENT OF LOW ENERGY PULSES

You may also like…

µROC | World’ Smallest Single-shot Autocorrelator

FROG | Frequency Resolved Optical Gating systems for ultrafast lasers

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ROC | Compact Autocorrelator for Ultrafast Laser Pulse Measurement

Ultra-compact/OEM size autocorrelator for ultrafast laser with single-pulse extraction up to 150kHz and pulse width from 5fs to 10ps.

ROC autocorrelator

Ultrashort laser pulse measurement

Autocorrelator MEASUREMENT OF LOW ENERGY PULSES

You may also like…

µROC | World’ Smallest Single-shot Autocorrelator

FROG | Frequency Resolved Optical Gating systems for ultrafast lasers

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