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Summary of Contents for THORLABS FSAOM
- Page 1 FSAOM Fast Modulator and Attenuator for Femtosecond, High Power Lasers at 1020 – 1080 nm User Guide...
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Page 2: Table Of Contents
1.4.4 Graphs ................................. 3 1.4.5 Mechanical Drawings ............................8 1.5.1 FSAOM Front Interface Panel ..........................9 1.5.2 FSAOM Sides, Back, and bottom ........................10 Chapter 2 Safety ......................... 12 Chapter 3 Installation ......................... 12 Chapter 4 Operation ........................14 4.2.1 Theory of Operation ............................ -
Page 3: Chapter 1 Introduction
Description This guide will provide you with essential information on how to effectively utilize the FSAOM for your specific applications. The FSAOM is designed to deliver high-performance modulation and attenuation capabilities, catering to a wide range of Yb-based lasers from 1020 nm to 1080 nm. -
Page 4: Optical Specifications
Fast Modulator and Attenuator for Femtosecond Lasers Chapter 1: Introduction Technical Data 1.4.1 Optical Specifications Specifications Proposed Contrast Ratio >1000:1 Operating Range 1020 - 1080 nm Included Photodetector Item # PDA20CS2 Input Polarization Linear, Vertical Output Polarization Linear, Vertical Rise/Fall Time <200 ns Modulation Frequency 0 - 2 MHz... -
Page 5: Laboratory Specifications
1.4.4 Graphs The transmission of the FSAOM depends on the analog input voltage, as well as factors such as optical power, wavelength, and the spot size of the input beam. Please refer to the following figures for the typical transmission of the FSAOM in relation to the mentioned parameters. - Page 6 Fast Modulator and Attenuator for Femtosecond Lasers Chapter 1: Introduction Figure 3 Typical FSAOM Transmission at Different Wavelengths Spanning from 1000 nm to 1080 nm Typical Transmission vs. Spot Size Input Spot Size (mm) Figure 4 Typical FSAOM Transmission at Different Spot Sizes of the Input Beam...
- Page 7 Fast Modulator and Attenuator for Femtosecond Lasers Chapter 1: Introduction An externally modulated voltage will induce modulation of optical power. The typical modulation performance at 1 MHz, as well as the typical rise and fall times of the modulated light, are depicted below. Figure 5 Typical Modulation Performance at 1 MHz Analog Voltage...
- Page 8 Fast Modulator and Attenuator for Femtosecond Lasers Chapter 1: Introduction Delay Time: 472 ns Analog Voltage Transmission Fall Time: 79 ns Figure 7 Typical Fall Time of the Modulated Light – Analog Port Digital Rise Time Delay Time: 468 ns Digital Voltage Transmission Rise Time: 94 ns...
- Page 9 Typical Modulation Performance at Modulation Frequencies of 1, 2, and 3 MHz The built-in optics within the FSAOM compensate for the angular dispersion of the transmitted light. The images below are taken at the focus of a 100 mm lens in front of the output beam without (image on the left) and with (image on the right) an angular dispersion compensating prism, which demonstrates how the built-in optics can effectively eliminate angular dispersion.
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Page 10: Mechanical Drawings
Fast Modulator and Attenuator for Femtosecond Lasers Chapter 1: Introduction Figure 11 Compensated Angular Dispersion thorough the Built-in Optics 1.4.5 Mechanical Drawings Figure 12 FSAOM Mechanical Drawing Page 8 TTN362477-D02... -
Page 11: Fsaom Front Interface Panel
Fast Modulator and Attenuator for Femtosecond Lasers Chapter 1: Introduction Components 1.5.1 FSAOM Front Interface Panel The Electrical Interface Panel will be explained in more details in Section 4.2. Figure 13 FSAOM Front Interface Panel Front Panel Callout Description Electrical Interface Panel Output Monitor, Item # PDA20CS2 Rev. -
Page 12: Fsaom Sides, Back, And Bottom
Fast Modulator and Attenuator for Femtosecond Lasers Chapter 1: Introduction 1.5.2 FSAOM Sides, Back, and bottom Not for Customer Use (x 4) Figure 14 FSAOM Side View Side Panel Callout Description Water Line Quick-Disconnect Couplings Included CL5A Clamp Location (4 Places) - Page 13 Fast Modulator and Attenuator for Femtosecond Lasers Chapter 1: Introduction Not for Customer Use Figure 16 FSAOM Back View Back Panel Callout Description Included CL5A Clamp Location (4 Places) Figure 17 FSAOM Bottom View Bottom Panel Callout Description Mounting M6 Holes for Optional Riser (Item #...
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Page 14: Chapter 2 Safety
FSAOMB Riser, utilizing the threaded holes on the underside. In this case, use Qty 4 M6 screws provided with the FSAOMB Riser to attach the riser to the bottom of the FSAOM, as shown in Figure 19. - Page 15 Fast Modulator and Attenuator for Femtosecond Lasers Chapter 3: Installation Figure 18 FSAOM Clamped onto an Optical Table Figure 19 FSAOM Attached to the FSAOMB Riser Rev. A, July 30, 2024 Page 13...
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Page 16: Chapter 4 Operation
Divide the provided water line (Item # HPU6) into two equal segments, each measuring 2.5 meters. Install the two in-line couplings (Item # QVF6) at the ends that will connect to the FSAOM unit. The remaining ends of the water lines should be connected to your chiller using appropriate couplings on your side. -
Page 17: Theory Of Operation
Fast Modulator and Attenuator for Femtosecond Lasers Chapter 4: Operation Front Panel Callout Description Rotary Knob, Source/Enable Digital In (BNC), 5 V, High-Z Analog In (BNC), 0 - 5 V, 1.5 kΩ AC Power Cord (Item # DS24) Connector Input Optical Specifications Error /Reset Button AC Power On/Off Switch Device Status Indicator... -
Page 18: External Analog And Digital Inputs
4.2.3 Error/Reset Button If an Error state occurs the FSAOM goes to Disabled State and Error/Reset button turns Red. This requires user to depress the Error/Reset button, and change the operation state back to Enable, via the Rotary Knob. If Error persists, consider the following options. - Page 19 The modulator is factory aligned to accept a beam centered and perpendicular to the input port. Figure 23 below shows a diagram of the internal beam path. The input port is compatible with Thorlabs’ SM05 lens tubes and cage systems, allowing a variety of optomechanical hardware to be attached to aid in alignment.
- Page 20 Iris 2 Figure 24 Initial Alignment: Position two mirror mounts before the device to align the light into FSAOM using the cage system and two irises. This method will roughly align your system and you should be able to see the light at the output of the modulator if the “AOM on”...
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Page 21: Chapter 5 Disposal
Contact Thorlabs for more information. Waste treatment is your own responsibility. “End of life” units must be returned to Thorlabs or handed to a company specializing in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site. It is the user’s responsibility to delete all private data stored on the device prior to disposal. -
Page 22: Chapter 6 Thorlabs Worldwide Contacts
Fast Modulator and Attenuator for Femtosecond Lasers Chapter 6: Thorlabs Worldwide Contacts Chapter 6 Thorlabs Worldwide Contacts For technical support or sales inquiries, please visit us at for our most up-to-date www.thorlabs.com/contact contact information. Corporate Headquarters Product Manufacturer Thorlabs, Inc. - Page 24 www.thorlabs.com...
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