THORLABS FSAC Скачать руководство пользователя страница 1 | Manualshive

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THORLABS FSAC Скачать руководство пользователя страница 1

FSAC
Interferometric
Autocorrelator

User Guide

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Содержание FSAC

Страница 1: ...FSAC Interferometric Autocorrelator User Guide...

Страница 2: ...roblems 9 4 4 1 Sampling Rate 9 4 4 2 Photodiode and Amplifier Bandwidth 10 4 4 3 Saturation 11 4 4 4 Excessive Chirp 11 4 4 5 Peak to Background Ratio Too High Low 12 4 5 Measuring Short 40 fs Pulses...

Страница 3: ...ol Description Direct Current Alternating Current Both Direct and Alternating Current Earth Ground Terminal Protective Conductor Terminal Frame or Chassis Terminal Equipotentiality On Supply Off Suppl...

Страница 4: ...aser energy onto the retina Follow all safety precautions in the operator s manual 1 Never aim any laser at a person s eye skin or clothes 2 Always use proper laser safety eyewear 3 Avoid wearing watc...

Страница 5: ...the delay between them and recombines the pulses at a photodiode Because the photodiode is not responsive over the fundamental wavelength band of typical Ti sapphire lasers two photon absorption is r...

Страница 6: ...ld fall between 1 and 10 W If the peak average power exceeds this level then the average laser power of the beam entering the FSAC should be attenuated by using a neutral density filter or a Fresnel r...

Страница 7: ...90 degrees Attach the VRC2SM1 fluorescent alignment target to the alignment aperture of the FSAC Figure 3 The input aperture iris and the fluorescent alignment target provide two points which define t...

Страница 8: ...o the table M1 is adjusted to set the height of the beam and M2 is used to level the beam usually in alternating fashion The FSAC may be moved towards M2 to check the height and away from M2 to check...

Страница 9: ...M2 to center the beam on the fluorescent alignment disk Note that when the FSAC is grossly misaligned spurious reflections may appear on the alignment target so be sure to look for the brightest spot...

Страница 10: ...s maximum value and monitor the delay output to verify that the stage is moving The delay output should be roughly sinusoidal though it may be somewhat distorted due to nonlinear coupling between the...

Страница 11: ...off on the oscilloscope to 100 ms to avoid triggering off of both the forward and backward scan Next adjust the photodiode amplifier gain to maximize the signal to noise ratio without saturating the p...

Страница 12: ...tely resolve the envelope to estimate the pulse width 4 4 2 Photodiode and Amplifier Bandwidth The nominal detector bandwidth for each gain setting is shown in Table 1 For low gain settings the bandwi...

Страница 13: ...tenuated by using a neutral density filter or a Fresnel reflection from an uncoated window for example For an 800 nm 1 mm 1 beam saturation occurs when the product of the average and peak power of the...

Страница 14: ...t the reference mirror alignment in order maximize the peak to background ratio To do this begin by removing the FSAC lid using a 5 32 balldriver or the included 5 32 stubby hex key Next with the devi...

Страница 15: ...ulse bandwidth and consequently the transform limited pulse duration are already known then a system of equations can be derived and solved to estimate the pulse width entering the FSAC Referring to F...

Страница 16: ...the full width of the pulse so that the pulses no longer overlap in the combined beam there is no interference and the photodiode signal is at a minimum Figure 11 FSAC Optical Layout As photocurrent...

Страница 17: ...e is assumed to be either a Gaussian or secant squared shape in which case the full width half maximum FWHM of the upper envelope2 of the autocorrelation trace will be directly proportional to the FWH...

Страница 18: ...y autocorrelation with background 9 Using points near the beginning and end of the trace estimate the background and subtract it from the intensity autocorrelation trace to get the background free int...

Страница 19: ...er 5 Theory and Interpretation Rev B May 1 2017 Page 17 Figure 13 An interferometric autocorrelation of a chirped pulse transitions to an intensity autocorrelation in the wings Pulse width estimation...

Страница 20: ...metric Autocorrelator Chapter 6 Maintenance Page 18 TT121442 D02 Chapter 6 Maintenance The FSAC does not require regular maintenance To maximize lifetime of the device be sure it is powered off when n...

Страница 21: ...r needs to purchase additional installation or inspection services if the system is moved from the original installation point The buyer must provide the appropriate utilities and operating environmen...

Страница 22: ...y at 650 nm Internal Dispersion GDD 230 fs at 800 nm Nominal TOD 345 fs at 800 nm Nominal Maximum Average Power 150 mW Dimensions 6 90 x 5 53 x 4 82 175 3 mm x 140 4 mm x 122 4 mm 8 2 Electrical Requi...

Страница 23: ...1 0 Tapped Hole 6 35 mm Deep for 25 0 mm Pillar Post 3 Places Permanently Attached Adjustable Iris SM1D12D with Internal SM1 1 035 40 Threads 0 14 Deep Removable End Cap SM1CP2 Port Used for Alignment...

Страница 24: ...Interferometric Autocorrelator Chapter 9 Declaration of Conformity Page 22 TT121442 D02 Chapter 9 Declaration of Conformity...

Страница 25: ...her Thorlabs products such as Pure OEM products that means assemblies to be built into a unit by the user e g OEM laser driver cards Components Mechanics and optics Left over parts of units disassembl...

Страница 26: ...nada and South America Thorlabs Inc sales thorlabs com techsupport thorlabs com Europe Thorlabs GmbH europe thorlabs com France Thorlabs SAS sales fr thorlabs com Japan Thorlabs Japan Inc sales thorla...

Страница 27: ...www thorlabs com...

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