Inh.: Dr. Renate Gorre
D-78465 Konstanz / Germany
Fon: +49 (0)7533 97227
Fax: +49 (0)7533 97228
Series in Quantum Electronics
Henry Baltes, Peter Günter, Ursula Keller,
Fritz K. Kneubühl , Walter Lukosz,
Hans Melchior, Markus W. Sigrist
Picosecond Solid-State Lasers with
1st edition 2007. XXIV, 130 pages; 64,00. ISBN 3-86628-156-0
Pulsed laser sources with repetition rates of several gigahertz are required for different applications, of which telecommunication through optical fibers is the most common and driving. Other applications like electro-optical sampling, analog-to-digital conversion, clock distribution and photonic switching, to name a few, can profit from such sources. Different approaches are currently investigated for light sources delivering pulse trains at high repetition rates, e.g. active or hybrid mode-locked semiconductor lasers or actively harmonically mode-locked fiber lasers. New passive mode-locked Er:Yb:glass lasers are now serious competitors and have also become commercially available.
This thesis investigates multi-GHz passively mode-locked solid-state lasers emitting at the telecom wavelengths around 1.3 µm and 1.5 µm. We successfully mode-locked Er:Yb:glass lasers with repetition rates up to 77 GHz, which is the highest repetition rate demonstrated so far for a solid-state laser at 1.5 µm. Relevant requirements for telecommunication applications like wavelength-locking, spectral flattening and spectral broadening were demonstrated at a repetition rate of 50 GHz.
We investigate the noise on pulse trains of passively mode locked lasers. Besides a thorough theoretical analysis of the noise properties of pulsed laser sources, we present a new method for accurate timing jitter measurements based on the indirect phase comparison of two mode-locked lasers which can be either free running or synchronized to an external reference clock. With the new measurement method we demonstrate nearly quantum-noise limited timing jitter performance of two 10-GHz Er:Yb:glass lasers. The free-running timing jitter was 190 fs (100 Hz1.5 MHz). Synchronizing to an external clock suppressed the long-term drifts and reduced the relative timing jitter to 26 fs (6 Hz1.5 MHz).
About the author:
received his diploma degree in physics from the ETH
Keywords: Mode-locked Lasers, Solid-State Lasers, Er:Yb:glass Lasers, Nd:YVO4 Lasers, Semiconductor Saturable Absorber Mirror (SESAM), Timing Jitter, Quantum Noise
Direkt bestellen bei / to order directly from: Hartung.Gorre@t-online.de