Boston University

Optical Characterization and Nanophotonics Laboratory








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Acton Research SpectraPro 300i Spectrograph

This is a 300mm, f/4 aperture, triple grating monochromator and spectrograph that features dual exit ports, a large 14x27 mm focal plane, and an imaging optical system designed for multichannel CCD spectroscopy.




Burleigh WA-1100 Wavemeter

The WA-1100 Wavemeter system is an instrument designed for simple, automatic and accurate wavelength measurement of continuous wave (CW) laser sources. Wavemeter systems count interference fringes produced by the input laser radiation in a scanning Michelson interferometer and simultaneously count fringes from a built-in reference laser. The ratio of the fringe counts of the input laser and the reference laser provides the wavelength of the input laser.




Burleigh WA-20 Wavemeter

We have two of these Wavemeters, which measure the wavelength of light sent into the input port with 0.01 nm precision. The input light is interfered with a known source (632.5 nm HeNe), making the determination of wavelength a simple task of counting fringes.




Coherent Sapphire 488 Solid State Laser

This is a Continuous Wave, Solid-State Diode-Pumped Laser with 20 mW output power at 488 nm.




Conoptics Pulse Picker

As the name implies, we use it to pick pulses of the picosecond laser. It can also be calibrated to pick every Nth pulse.




Dye laser

This laser takes as its lasing material a stream of dye molecules suspended in liquid (check with Hans). In its current configuration, it is tunable from (check with Hans).




Femtochrome Autocorrelator

This is used for measuring the pulse duration of the picosecond laser, by splitting a pulse into two and tthen measuring the correlation between the two pulses. (by this method, a pulse of 1.5 picoseconds width will be equivalent to 50 microseconds on a scope.




General purpose NSOM

This near-field scanning optical microscope was designed to have as much flexibility as possible. We built it using a sample-scanning design, making it suitable for a wide range of samples, especially laser diodes. The integration of a high quality metallurgical microscope allows for easy collection of photoluminesence, also.




Hewlett Packard 4156A Precision Semiconductor Parameter Analyzer

General purpose instrument for, you guessed it, the precision analysis of semiconductor devices.




Hewlett Packard 54750A Digitizing Oscilloscope

This fast, low noise, high resolution oscilloscope is used in the characterization of the high-speed photodetectors that we design and fabricate.




Karl Suss PM5 Probe Station

This Karl Suss probe station was designed to test small semiconductor devices on wafer, and we've taken that one step further. By substituting a single mode fiber for one of the electrical probes, we use this to characterize our photodetectors.




Low-temperature NSOM

This near-field scanning optical microscope is realized in a very small package less than a inch in diameter and 6 inches long. This allows it to be placed into a low temperature dewer at 4 K.




Low-temperature Polarizing Probe

Low-temperature Polarizing Probe




Multichannel Plate PMT

This is a Hamamtsu R3809U-59 Multichannel Plate Photomultiplier Tube (MCP-PMT). MCP-PMTs have superior time response over the ordinary photon counting tubes, because time spreading of the arrival of multiplied photoelectrons is much less due to the confinement of the photoelectron multiplication into tiny channels in a multi-channel plate (hence the name). This model has a rise-time of 177ps and short time spread of 53ps which makes it suitable for fast and high-resolution time correlated photon counting.




Newport Model 6000 Laser Diode Controller

The Model 6000 Laser Diode Controller follows in the footsteps of the Model 8000 Modular Controller providing flexible solutions to a variety of laser diode control applications. It has an integral 32 W temperature controller and one bay that accepts a variety of laser diode driver modules.


Programming Guide 


Renishaw Raman microprobe RM1000B

The Raman microprobe instrument from Renishaw Inc is a model RM1000B. The Leica DM/LM Microscope has an encoded scanning stage allowing 200 nm precision. The instrument is used both for Raman measurements and as a general image spectrometer for the lab.




Spectra Physics Argon Ion laser

This laser is used primarily to pump the picosecond ti:sapphire laser. It consumes 50 kW of electrical power, converting it into 20 W of optical power, mostly at 514 nm (green) and 488 nm (blue-green).



Standard Operating Procedure 

Spectra Physics CW Ti:Sapphire laser (model 3900)

This coninuous wave laser emits up to a watt of light in the near-infrared, continuously tunable from 700nm to 1000nm. We've added a stepper motor to the wavelength tuning micrometer, to allow for easy computer control of the wavelength.



Standard Operating Procedure 

Spectra Physics Millenia V laser

This laser is used primarily for pumping the CW Ti:sapphire, but its output of 5 W, 532 nm (green) light could be used for other applications.




Spectra Physics Ti:Sapphire laser

Titanium Sapphire. Equiped with a doubler and tripler with which two photons can be combined to make one photon of double the intensity, and the process can be repeated to make one with 3 times the intensity.




Spectra Physics Tsunami Ti:Sapphire Picosecond Laser

Titanium Sapphire. Equiped with a doubler and tripler with which two photons can be combined to make one photon of double the intensity, and the process can be repeated to make one with 3 times the intensity.




Spex 0.6 m spectrometer

Spex 0.6 m spectrometer




Spex Spectrometer

This small (0.6 m) spectrometer with integrated broadband white light source is used for a variety of projects such as reflectivity measurement of polarization sensing photodetectors.




Waveguide NSOM

This near field scanning optical microscope (NSOM) was designed specifically for studying optically pumped structures, particularly waveguides. It does this with a tip-scanning design, allowing the sample to remain stationary to the optical launch equipment.




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