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Custom Femtosecond Transient Absorption Data Acquisition Systems
High-repetition-rate white-light pump–probe spectroscopy with a tapered fiber
M. Punke, F. Hoos, C. Karnutsch, U. Lemmer, N. Linder, K. Streubel
(pdf)
Optics Letters 31 (8), p. 1157-1159 (2006)
We have realized a 76 MHz white-light differential transmission spectroscopy
system. The technique employs a Ti:sapphire laser oscillator TIF-50, Del Mar
Ventures, San Diego (current model name Trestles 50)
and a tapered fiber (NT&C, Marnheim, Germany) to generate a white-light
continuum spanning almost the full visible to near-infrared spectral range.
Using acousto-optical modulation and subsequent lock-in detection, transient
relative transmission changes as small as 10−5 are detected. The method is
applied to study the ultrafast gain dynamics of the active layer of a
vertical-external-cavity surface-emitting laser based on a multiple-quantum-well
structure.
Fig.1 Schematic diagram of the experimental setup.
AOM, acousto-optic modulator; DC, dichroic mirror; DL,
delay line; IF, variable interference filter; SHG, second harmonic
generation.
Fig 2. Tapered fiber output spectra.
(Photograph of the beam after diffraction on a grating.)
Fig. 3 Differential transmission measurements of the investigated AlGaInP MQW
structure.
Pump wavelength, 400 nm; pump pulse energy, 150 pJ.
 |
Martin Punke
Universität Karlsruhe (TH)
Light Technology Institute
Kaiserstr.12
D-76131 Karlsruhe
Martin.punke@lti.uni-karlsruhe.de
Martin Punke received the M.Sc in electrical engineering and information
technology from the University of Karlsruhe in 2003. In his master thesis he
worked on the realization of a femtosecond pump-probe setup utilizing a tapered
fiber for white-light generation. Since 2003, he has been working towards his
PhD degree at the Light Technology Institute of the
University of Karlsruhe. He is currently working on the combination of organic
semiconductor devices like OLEDs, organic photodiodes and lasers with
micro-optics for applications like biological sensor systems and optical
interconnects. |
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Product Data Sheets
Del Mar Photonics Product brochures -
Femtosecond products data sheets (zip
file, 4.34 Mbytes) - Del Mar Photonics
Send us a request for
standard or custom ultrafast (femtosecond) product
Pulse
strecher/compressor
Avoca SPIDER system
Buccaneer femtosecond
fiber lasers with SHG Second Harmonic Generator
Cannon Ultra-Broadband Light
Source
Cortes Cr:Forsterite
Regenerative Amplifier
Infrared
cross-correlator CCIR-800
Cross-correlator Rincon
Femtosecond Autocorrelator
IRA-3-10
Kirra Faraday Optical Isolators
Mavericks femtosecond
Cr:Forsterite laser
OAFP optical attenuator
Pearls femtosecond fiber laser
(Er-doped fiber, 1530-1565 nm)
Pismo pulse picker
Reef-M femtosecond scanning
autocorrelator for microscopy
Reef-RTD scanning
autocorrelator
Reef-SS single shot
autocorrelator
Femtosecond Second Harmonic Generator
Spectrometer ASP-100M
Spectrometer ASP-150C
Spectrometer ASP-IR
Tamarack and Buccaneer
femtosecond fiber lasers (Er-doped fiber, 1560+/- 10nm)
Teahupoo femtosecond Ti:Sapphire regenerative amplifier
Femtosecond
third harmonic generator
Tourmaline femtosecond fiber
laser (1054 nm)
Tourmaline TETA Yb
femtosecond amplified laser system
Tourmaline Yb-SS
femtosecond solid state laser system
Trestles CW Ti:Sapphire
laser
Trestles femtosecond
Ti:Sapphire laser
Trestles Finesse
femtosecond lasers system integrated with DPSS pump laser
Wedge Ti:Sapphire multipass amplifier