Fiber Coupled TEC Laser

World Star Tech’s Fiber Coupled TEC Lasers combine a temperature-stabilized laser, drive electronics, and a fiber pigtail in one compact housing. Output is delivered through Polarization Maintaining (PM), single-mode, or multimode fiber, with an optional collimator for a ready-to-use free-space beam. 

Wavelengths: 405, 450, 488, 505, 520, 528, 532, 561, 594, 635, 642, 658, 785, 830 and 850 nm. Wide range of output powers available. Custom wavelengths and OEM integration are available. Contact us to discuss your requirements.

A circular fiber coupled beam
Laser diodes emit an elliptical beam that corrective optics cannot make truly round. Fiber coupling fixes this at the source. Single-mode and PM fiber carry only the fundamental mode, so the output is a circular, near-Gaussian beam regardless of the diode’s native shape. The fiber also acts as a spatial filter, removing higher-order mode content and decoupling your optical path from the laser’s mechanical alignment.

This matters wherever beam symmetry drives performance:

• Confocal and fluorescence microscopy: a symmetric, diffraction-limited focus that matches a circular pinhole.
• Flow cytometry: a known, symmetric input to beam-shaping optics for a predictable interrogation spot from unit to unit.
• Optical tweezers: equal trap stiffness in both lateral axes.
• Interferometry and digital holography: a clean reference wavefront for high fringe contrast and accurate phase reconstruction.
  
  

  Why temperature control matters
  Diode wavelength shifts with temperature, and output power and fiber coupling efficiency drift with it. The integrated thermoelectric cooler (TEC) holds the diode at a fixed setpoint, keeping wavelength and fiber output power stable over long runs and through changes in environment. This keeps Raman peak positions and filter passbands aligned, and keeps signal levels repeatable in cytometry and imaging.

Built for integration
Set laser power, temperature, and modulation sequences over USB from a PC, or over SPI or I2C directly from your instrument’s embedded controller. The unit can also run stand-alone. Fiber delivery keeps laser heat away from sensitive optics, and units can be swapped without realigning beam paths, ideal for OEM instruments.

Applications

• Flow cytometry and cell sorting: consistent excitation across long acquisitions.
• Laser scanning and confocal microscopy: circular, polarization-controlled excitation.
• Raman spectroscopy: a temperature-locked wavelength for stable spectral calibration.
• Optical tweezers: a symmetric Gaussian focus for uniform trapping.
• Interferometry and microscopy: a clean, spatially filtered reference beam.
• Biomedical and bioanalytical instrumentation: a compact, remotely controlled OEM light source.
• Sensing and metrology: a repeatable source for alignment and calibration.