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Testing and characterisation
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Variable
angle spectroscopic
ellipsometer
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Sopra
GES5 spectroscopic ellipsometer for determining refractive indices of
glasses, semiconductors, metals and dielectrics. The ellipsometer
operates at wavelengths from 250 to 2000 nm, and determines optical
transmission and reflection of light. Work has been started to compile
a comprehensive refractive index database for semiconductors. Services
for companies and universities include measurements of refractive index
and thickness for layers from 2 nm up to several microns.
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Profilometer
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Dektak IID measures surface
profiles (topography). Scan length is from 50 micron to 30 mm with a
vertical resolution of 0.5 nm. |
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Autocorrelator
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Femtochrome FR-103XL
autocorrelator, used to measure ultra-short pulses by optical
autocorrelation and second harmonic generation. Resolution: 20 fs,
minimum pulse repetition rate < 1 MHz.
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Reflectance
measurement
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Filmetrix reflectance system, capable of measuring sample
reflectance in the 600 – 1,000 nm range. The system is equipped with a
powerful software package for reflectance simulation for various
semiconductor and dielectric materials.
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Optical
microscopy
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Polyvar phase contrast microscope for visual
inspection of semiconductor surfaces. A Nomarski prism detects small
changes in surface morphology. Maximum magnification:
3000 x. Equipped with a digital camera.
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Optical
spectrum analyzer
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ANDO
AQ6315A is a high sensitive optical spectrum analyzer. AQ6315A is
equipped with an input port supporting a wide range of core diameters
of optical fibre for a diverse range of applications. Wavelength range:
350 - 1750 nm, wavelength span: 0 - 1400 nm, wavelength resolution:
adjustable 0.05 to 10 nm.
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Power
meters
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An
example of ORC’s power meters for high-power and small-signal
applications. A thermal power-meter can measure up to 50 W of optical
power in the wavelength range of 0.19 - 20 um. High-sensitivity power
meters can measure down to -70 dBm at 780 - 1700 nm. Power meters are
from Ando, ILX Lightwave, Ophir, Newport and Infos.
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Tunable
lasers
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Tuneable lasers provide sharp laser
lines at selected wavelengths. Measurement setups often depend on the
tuning range of lasers. Both tuneable lasers can be controlled with a
computer. Wavelength ranges: 1525 - 1625 nm and 1500 - 1565 nm,
wavelength resolution: 0.001 nm, linewidth: >100 MHz, absolute
wavelength accuracy: 0.04 nm.
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Chromatic
dispersion measurement
system
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system measures chromatic dispersion of optical components (crystals,
semiconductor mirrors, etc.), including a transmission and reflection
optics and fibre components (couplers, tapers, doped fibres). Main
parts of the system are: fibre coupled light sources for different
parts of optical spectrum (1000 - 1700 nm), stepper motor and
piezo-transducer for very high precision interferometer tuning, and
optical spectrum analyser and digitizing oscilloscope. |
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Optical
system performance test
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AGILENT
8722 ES 40 GHz for performing high frequency tests, such as modulation
bandwidth measurements. All these measurements are obligatory for the R
& D of high-speed photonic devices. Frequency range: 50 MHz - 40
GHz, dynamic range: 100 dB, 2 measurements channels, S-parameters tests.
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Digital
sampling oscilloscope
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Digital
sampling oscilloscope has a 40 GHz main frame and a 20 GHz sampling
head and suits high-speed component testing. Combined with a pattern
generator it provides valuable information of telecom lasers (rise and
fall times, pattern diagrams and their statistics).
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Pulse
pattern generator
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ADVANTEST
D3186 12.5 Gbit/s data generator for testing the performance of optical
systems. The data generator also allows for rise / fall time and chirp
measurements. Frequency range: 150 MHz – 12.5 GHz, rise / fall time:
< 30 ps, timing jitter: 10 ps, amplitude range: 2 V p-p.
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Manufacturing systems
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Fiber
coupler manufacturing
station
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Fibre
coupler manufacturing station from NTT-AT enables fabrication of 2 x 2
tap-couplers, wavelength selective couplers and wavelength independent
couplers. Tap couplers: 50 – 100 % splitting ratio (single mode),
WDM-couplers: Arbitrary 2 wavelengths (fibre limited) with a minimum
wavelength separation of ~100 nm.
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Fiber
bragg grating system
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| Fibre
Bragg grating (FPG) system to prepare various kinds of fibre
Bragg gratings like chirped FPG’s. System will be operational in 2005. |
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