Columbia University has a fully equipped integrated optics facility, including test laboratories with tunable CW and short-pulsed lasers and fabrication facilities. The materials preparation laboratory has facilities to prepare crystal samples for integrated optics experiments. It is equipped with a state-of-the-art clean room. Electron-beam lithography can be accomplished with three in-house SEM e-beam writers, including one field-emission-based system. Additional e-beam patterning facilities are available on an as-need basis from Brookhaven National Laboratories. Thermal evaporators, e-beam evaporators, and sputtering sources are available.

The facility also includes two laboratories containing ultrashort pulse and CW laser systems capable of producing femtosecond (fs) laser pulses for device testing, including a regenerative-amplified Ti-Sapphire-based OPA, which is tunable over a broad range of infrared and visible wavelengths, a modelocked Ti:Sapphire laser system, and an Er-doped fiber laser system. The labs also have a full range of pulsed and CW 1.3 and 1.55 mm laser sources, single-mode fibers and a 1.50-1.57mm tunable laser source.

Finally for simulation and design we have a computation laboratory with a wide range of dual- and single-processor based computational stations. In addition, it includes a 17-node parallel processing system available for three-dimensional and other computationally demanding applications. The lab has a full suite of CAD and simulation tools, for the design of integrated optical components. These include bidirectional BPM, FDTD, and other custom modeling tools for both microwave and optical applications.


  • Scanning Electron Microscope
  • Optical Microscope with digital image capture
  • Alpha-step profilometer
  • Prism coupler



  • Clean room
  • Mask aligner
  • Spinner
  • Laser writing



  • Windows, Linux and Sun workstations
  • Complete RSOFT CAD Suite for modeling optical devices and effects
  • 17 node Linux Cluster for computationally intense simulations



Laser Facilities

  • Various CW fixed-wavelength and tunable laser systems in the telecom range for device testing
  • Ultrashort pulse 1.55 micron Er-doped fiber laser


Other Laser facilities shared with the Surface Science Group

  • Ti:Sapphire Oscillator:
    • Coherent Mantis. Broadband Ti:Sapphire oscillator with integrated optically pumped semiconductor laser
    • Coherent Mira-Seed. Femtosecond mode-locked Ti:Sapphire laser
  • Ultrafast laser amplifier:
    • Coherent RegA 9050 Ti:Sapphire amplifier
  • Pump lasers:
    • Coherent Verdi 10W diode-pumped laser
    • Spectra Physics Millenia V
  • Optical Parametric Amplifier:
    • Coherent OPA 9450 with visible and IR output beams