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Implementation of electro-optic spectral shearing interferometry for ultrashort pulse characterization.
Inuk Kang1, Christophe Dorrer, Francesco Quochi
1Bell Laboratories-Lucent Technologies, 101 Crawfords Corner Road, Holmdel, New Jersey 07733, USA. inukkang@lucent.com
Optics Letters
|December 3, 2003
Summary
Electro-optic spectral shearing interferometry enables sensitive characterization of ultrashort laser pulses. This technique accurately measures 200-fs pulses from an optical parametric oscillator using low average power.
Area of Science:
- Optics and Photonics
- Ultrafast Laser Science
- Metrology
Background:
- Characterizing ultrashort laser pulses is crucial for scientific research and applications.
- Existing methods may lack sensitivity or require complex setups for low-power sources.
Purpose of the Study:
- To implement electro-optic spectral shearing interferometry for sensitive ultrashort pulse characterization.
- To demonstrate the technique's capability with a free-running optical parametric oscillator.
Main Methods:
- Utilized electro-optic spectral shearing interferometry.
- Employed a phase-locked-loop clock recovery circuit to extract a microwave clock signal.
- Drove a phase modulator for spectral shearing using the recovered clock signal.
Main Results:
- Achieved highly sensitive temporal characterization of ultrashort pulses.
- Successfully characterized 200-femtosecond (fs) pulses from an optical parametric oscillator.
- Demonstrated accurate measurements at an average power of 5 picowatts (pW).
Conclusions:
- Electro-optic spectral shearing interferometry is a viable and sensitive method for ultrashort pulse characterization.
- The technique is effective even for low-power, free-running laser sources.
- This advancement offers precise temporal measurements for ultrafast optics.