Carpe is a handy option for reviewing the management of short laser pulses in an optical microscope system.

NIST Traceable Calibration

Laboratories and manufacturers are often faced with systematically establishing an unbroken chain of calibrations to specified references. All APE autocorrelator models are calibrated to a traceable standard in accordance with NIST (U.S. National Institute of Standards and Technology) measurement traceability specifications. A printed and signed calibration certificate is provided with each pulseCheck.

Master Pulse Broadening at the Microscope

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 broadening effect. This effect is caused by dispersion of the microscope optics, but also depends to a large extent on the pulse width of the incoming laser beam.

Power Detection at the Sample Location

Power detection at the sample location supports systematic and quantitative studies which explore how laser power affects samples or the fluorescence lifetime of probes.

Optimize Microscopy Imaging

By examining the influence of the laser pulse duration, the power, and the dispersion of the microscope optics, you can fine-tune and optimize microscopy imaging at the relevant spot. These measurements can be also done using large NA (numerical aperture) or immersion lenses.

Basics about Pulse Compression

Read about the basics of pulse compression, dispersion, prism & grating compressor, GVD


At a Glance

Carpe Autocorrelator Specification 
Measurable Pulse Width50 fs ... 3.5 ps; Optional: 30 fs ... 3.5 ps
Wavelength Range (for pulse width measurements at sample location) 700 ... 1250 nm or
1250 ... 2000 nm
Wavelength Range (for power detection at sample location)700 ... 1050 nm
Power Measurement0 ... 30 mW, 0 ... 300 mW
Recommended Repetition Rate> 500 kHz
Working Distance> 0.5 mm,
Optional < 0.5 mm
Input PolarizationLinear horizontal
  • Study the effect of pulse duration, power, and optics dispersion on microscopy imaging
  • Measure pulse widths at the sample position and point of microscope input
  • Measure average power at sample position
  • Estimate the peak power in conjunction with the pulse width
  • Option: Short working distance, e.g. for immersion objective lenses
  • Option: femtoControl for optimizing the duration of femtosecond laser pulses

Datasheets & Brochures

Step File

 Carpe_Stepfile_20130214 (.stp 3D CAD model with overall dimensions)

Contact Us

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Email & Phone Contacts

APE has distributors around the world to give you the best support. Choose a country to find your local sales contact:

APE Angewandte Physik & Elektronik GmbH
Plauener Strasse 163-165 | Haus N
13053 Berlin, Germany

Tel +49 30 986011-30
Fax +49 30 986011333


Coherent Scientific pty. Ltd.
Hilton SA 5033, South Australia

Phone: +61 8 8150 5200

Pinnacle Scientific Cooperation
Hangzhou, Jianggan District
China 310020

Phone +86 571 88225151

PulsePower Technology Ltd.
Beijing, Haidan District
China 100090

Phone +86 10 62565117

199 00 Praha 9, Česko

phone +420 212 247 293

Gammadata Instrument AB
750 02 Uppsala

Tel: +46 18 56 68 35

F 92170 Vanves, France

Tel: +33 1 419 061 80

Laser Sciences Services Pvt. Ltd.

Tel: +91 2778 1673

Photonic Solutions PLC
Edinburgh, UK

Tel: +44 131 664 8122

Ammo Engineering Ltd.
Petach Tikva 49517, Israel

Tel: +972 3 9239 666

Optoprim Srl.
20052 Monza, Italy

phone +39 (039) 834977

Phototechnica Corporation
Saitama 336-0017, Japan

Tel: +81 48 871 0067

Seoul 137-862, Korea

Tel: +82 2 3461 1103

Mexico City 03100, Mexico

Tel: 52(55) 5575-0312/0269/9929

Eurotek International
02-668 Warsaw, Poland

Tel: +48 2284 379 40

Innova Scientific S.L.
28290 Las Rozas de Madrid, Espana

Tel: +34 91 7105650

AceXon Technologies Pte. Ltd.
Singapore 658065

Tel: +65 (6565) 7300

Innova Scientific S.L.
28290 Las Rozas de Madrid

Tel: +34 91 7105650

Dyneos AG
CH-8307 Effretikon

Tel: +41 52 355 12 40

SuperbIN Company Ltd.
Taipei 11493
Taiwan, R.O.C.

Tel: +886 2 265 706 78

Photonic Solutions PLC

Tel: +44 131 664 8122

APE Applied Physics & Electronics, Inc.
47635 Lakeview Blvd.
Fremont, CA 94538, USA

Tel: +1(888) 690-3250

Better Imaging with Dispersion Control

Application Example

Carpe in combination with femtoControl can help to achieve more crisp and clearer microscope images. The increased information content of the images is due to a solution that detects and corrects inevitable dispersion effects when using femtosecond laser pulses for multi-photon microscopy.

The laser pulse duration is measured at both the input of the microscope and at the sample location under the microscope. This allows to detect dispersion effects and to compensate them with femtoControl.

Furthermore, power detection at the sample location supports systematic and quantitative studies, which can help exploring how the laser power affects the received signals and images.

Our Autocorrelators at a Glance

A pulseCheck with FROG Option? A Mini? PMT, TPA, or PD Detector? Discover Our Autocorrelator Family.