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Thorlabs: Modular Optical Tweezers Kit

Thorlabs OTKB (OTKB/M) Optical Tweezer Kit consists of five pre-assembled segments with which optical tweezers, also known as an optical trap, can be constructed. The advantage to purchasing and assembling this kit is the flexibility it provides over other closed optical tweezer systems. Since the optical tweezer system is built using standard Thorlabs' components, it is easy to modify or upgrade the system using other standard components. The kit is shipped in pre-assembled segments and will only require final coupling of segments and alignment. A step-by-step assembly instruction manual is provided with each kit.

 

Once constructed, we suggest our OTKBTK Sample Preparation Kit, which provides users with everything necessary to prepare a sample and determine that their optical tweezer kit has been properly assembled and functioning. For customers who prefer to have the system shipped assembled, aligned, and tested on a breadboard, we are able to provide this at an additional cost. We also offer a module that adds computer-controlled trap positioning to the optical tweezer system by integrating our  2D galvo mirror system. This is described under the Applications Module tab above. We also describe a module that enables you to add fluorescence spectroscopy to the system. If you are interested in either the assembled version, the steering module, or fluorescence module, and would like to receive a quotation, please contact  David Fairbank.

S. Wasserman, D. Appleyard and M. Lang at the Department of Biological Engineering, MIT published an article (Optical Trapping for Undergraduates, Am. J. Phys. 75 (1), January 2007) on an optical tweezer system that they designed and built for use in teaching labs. Thorlabs, in collaboration with the aforementioned, has developed this kit so that others may build optical tweezers with similar capabilities as the system published in the American Journal of Physics. Thorlabs' optical tweezers, or optical traps, have been employed in numerous experiments and have been utilized in many graduate-level instructional laboratories.

One of the principal advantages of the OTKB (OTKB/M) optical tweezer kit over a black box system is the ease with which the design of the optical trap can be modified to add functionality. For example, the OTKBFM is a position sensing module that can be easily attached to the base OTKB (OTKB/M) kit. Unlike the fully functional OTKB (OTKB/M) kit, an additional DAQ card and software will be required to calibrate the position, stiffness, and force of the optical trap using the OTKBFM position sensing module. The OTKBFM position sensing module does provide the user with the components needed to add calibration capability to the OTKB (OTKB/M) optical trap.

Features:

  • Trap Laser:
  • SM Fiber Coupled DFB Laser, 14-Pin Butterfly Package
  • 975 nm, 330 mW (Max)
  • Integrated TEC Element for Temperature Stabilized Output
  • LD Controller and Mount Included
  • Nikon 100X Oil Immersion Objective
  • Inverted Light Microscope Design
  • 3-Axis Sample Positioning Stage
  • CCD Camera with USB Interface for Video Imaging
  • Position-Sensing Detector Module Available
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