Instrumentation
Optics Laboratory Instrumentation
The optics laboratory contains a suite of instruments for characterizing optical sources, particularly lasers, and the optical properties of materials. Some of these instruments are connected by single-mode optical fiber to JILA research groups laboratories. The fiber links allow the instruments to be used remotely. The results are read back from a server over a new high-speed local area network installed as part of the Keck lab. The measurements performed by some instruments do not allow intervening fiber; these instruments are located on carts so that they can moved into research labs. Others remain in the Keck Laboratory. The optics lab is also used for teaching alignment and operation of ultrafast lasers.

arrow Instruments*
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Dimensional AFM
Used for profiling features and determining critical dimensions on substrates as large as 6" in diameter.

Make: Digital Instruments
Model: Dimension 3100
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Multi-mode Atomic Force Microscope
Multi-Mode Atomic-Force Microscope
Scanning probe microscope used to characterize surfaces with atomic resolution.

Make: Digital Instruments
Type: MMAFM-2

Beam Profiler
Displays the spatial profile of a laser beam and beam propagation information (cart).

Make: Spiricon
Model: Beam Gage & M2-200s-FW-A
Filter Wheel: LBS-160
Camera: SP300
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Diode-Pumped Laser
Diode-pumped Ti:Sapphire Laser
Ti:sapphire is the standard laser medium used to produce ultrashort pulses. This laser will be used to train students on the basics of laser alignment and advanced students on the production of ultrashort pulses. The laser was purchased in kit form to be more useful as a teaching tool.

Pump Laser
Make: Coherent
Model: Verdi
Output Power: 5W
Wavelength: 532 nm

Ti:Sapphire Laser
Make: K/M Labs
Wavelength: 800 nm
Output Power: CW: 850mW; Modelocked: 450mW
Cavity Length: 1.6 m
Repetition Rate: 187 MHz
Directly out of the Oscillator Pulse Width: ~100 fs
Transform Limited Pulse Width: ~ 20 fs

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Ellipsometer
Determines the thickness and optical constants of thin dielectric films. Used to characterize optical coatings.

Make: J.A. Woollam
Model: VASE-VB 250
Type: Variable Angle, Spectroscopic
Angle of Incidence Range: 20 degrees – 90 degrees (transmission)
Angular Resolution: 18 arc seconds
Wavelength Range: 240nm – 1100nm
Probe Diameter: 3 mm (100 microns with probe tubes)
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Fiber Cleaver
Used for straight and angle cleaving of fiber optics.

Make: PK Technology
Model: FK12
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Fiber Fusion Splicer
Produces very low loss splices between optical fibers by fusing the fibers together.

Make: Eriksson
Model: FSU 975
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Fizeau Interferometer
Fizeau Interferometer
Wavefront analyzer for characterizing the flatness of optical elements.

Make: Zygo
Model: GPI XP
Aperture: 4"
Reference Flatness: Lambda/50
Accessories: 4" to 33mm converter for characterizing small samples

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Frequency-Resolved Optical Gating Apparatus
Allows the complete electric field (amplitude and phase) of an ultrashort optical pulse to be determined (cart).

Make: KM Labs
Model: SHGF-10
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Fourier Transform Infrared Spectrometer (FTIR)
Measures the transmission and reflection properties of optical elements and materials in the far infrared

Make: Nicolet Instruments
Model: Nexus 670
Wavelength Range: 7400cm-1 – 200cm-1 (1351nm – 50um)
Resolution: 0.09 cm-1
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Optical Multimeter
Measures optical power.

Make: Hewlett Packard
Wavelength range: 450–1700 nm
Sensitivity: -100 dBm (vis), -110 dBm (near-IR)
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Optical Profilometer
Measures feature height and surface quality.

Make: Wyko
Model: NT2000
Type: White light vertical scan interferometer, 602nm phase shift interferometer
Objectives: 5X Mickelson, 20X Mireau, 50X Mireau
Multipliers: 0.5X, 0.62X, 1X
Camera: 1 MP
Stage: 8" x 8" motorized
Features: Automated stitching, environmental enclosure, VLSI step height standards
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Optical Spectrum Analyzer
Provides measurement of optical spectra from 300–1700 nm with 0.05 nm resolution. This is a general purpose instrument.

Make: Ando
Model: AQ6315E
Wavelength Range: 350–1750 nm
Resolution: .05 nm
Sensitivity: -65 dBm
Maximum Power: +20 dBm
Dynamic Range: 70 dB
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Oscilloscope
Oscilloscope
Measures wave forms in the time domain. An optical to electronic converter allows it to monitor pulses produced by lasers (fiber).

Make: Tektronix
Model: TDS754C
Analog Bandwidth: 500 MHz
Sample rate: 2 Gs/sec

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Patch Panel
Allows different labs in JILA to be connected to the fiberized instruments in the Keck Lab. Also allows JILA labs to be connected to one another. The top portion of the cabinet is occupied by high-speed network switches to allow remote access to the measurement results. Located in B131.
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Polarimeter
Measures the polarization state of a laser beam and displays the results in real time on the Poincarč sphere (cart).

Make: Thorlabs
Wavelength Range: 400–1600 nm (two optical heads)
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Radio-Frequency Spectrum Analyzer
Provides a frequency domain characterization of electrical signals. An optical-to-electrical converter allows use with lasers. Useful in measuring the beat between two lasers.

Make: Hewlett Packard
Model: HP8593E
Frequency Range: 9 KHz to 22 GHz
Resolution Bandwidth: 30 Hz

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Stabilized Helium-Neon Laser
This laser is stabilized to Iodine to provide an absolute frequency reference at optical frequencies.

Model: 100
Wavelength: 633 nm (nominal frequency of 474 THz)
Output power: 75 microwatts minimum (100–125 typical)
Frequency Accuracy: 2.5 parts in 1011

Allan Variance:
1 x 10-11 (1 sec)
3 x 10-12 (10 sec)
1 x 10-12 (100 sec)
3 x 10-13 (1000 sec)
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UV-VIS-NIR Spectrophotometer
Measures the transmission and reflection properties of optical elements and materials from the ultraviolet to near infrared wavelengths.

Make: Varian
Model: Cary 500
Type: UV-VIS-NIR Wavelength
Range: 175nm–3300nm (57,142cm-1 – 3030cm-1)
Resolution: 0.03nm
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Wavemeter
Measures the frequency of a laser with an accuracy of 1 megahertz. For use with stabilized single frequency lasers.

Make: NIST Time & Frequency Division
Precision: 1 part in 109
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* Mention of commercial products is for information only; it does not imply NIST recommendation or endorsement, nor does it imply that the products mentioned are necessarily the best available for the purpose.

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