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Title: Semiconductor optical amplifier-based heterodyning detection for resolving optical terahertz beat-tone signals from passively mode-locked semiconductor lasers

Abstract

An all-optical heterodyne approach based on a room-temperature controlled semiconductor optical amplifier (SOA) for measuring the frequency and linewidth of the terahertz beat-tone signal from a passively mode-locked laser is proposed. Under the injection of two external cavity lasers, the SOA acts as a local oscillator at their detuning frequency and also as an optical frequency mixer whose inputs are the self-modulated spectrum of the device under test and the two laser beams. Frequency and linewidth of the intermediate frequency signal (and therefore, the beat-tone signal) are resolved by using a photodiode and an electrical spectrum analyzer.

Authors:
; ; ; ; ;  [1]
  1. Research Institute for Networks and Communications Engineering, Dublin City University, Glasnevin, Dublin 9 (Ireland)
Publication Date:
OSTI Identifier:
21470909
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 97; Journal Issue: 8; Other Information: DOI: 10.1063/1.3481674; (c) 2010 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMPLIFIERS; DETECTION; FREQUENCY MEASUREMENT; LINE WIDTHS; MIXERS; MODE LOCKING; OSCILLATORS; SEMICONDUCTOR LASERS; SEMICONDUCTOR MATERIALS; SIGNALS; TEMPERATURE RANGE 0273-0400 K; ELECTRONIC EQUIPMENT; EQUIPMENT; LASERS; MATERIALS; MATERIALS HANDLING EQUIPMENT; SEMICONDUCTOR DEVICES; SOLID STATE LASERS; TEMPERATURE RANGE

Citation Formats

Latkowski, Sylwester, Maldonado-Basilio, Ramon, Carney, Kevin, Parra-Cetina, Josue, Philippe, Severine, and Landais, Pascal. Semiconductor optical amplifier-based heterodyning detection for resolving optical terahertz beat-tone signals from passively mode-locked semiconductor lasers. United States: N. p., 2010. Web. doi:10.1063/1.3481674.
Latkowski, Sylwester, Maldonado-Basilio, Ramon, Carney, Kevin, Parra-Cetina, Josue, Philippe, Severine, & Landais, Pascal. Semiconductor optical amplifier-based heterodyning detection for resolving optical terahertz beat-tone signals from passively mode-locked semiconductor lasers. United States. doi:10.1063/1.3481674.
Latkowski, Sylwester, Maldonado-Basilio, Ramon, Carney, Kevin, Parra-Cetina, Josue, Philippe, Severine, and Landais, Pascal. 2010. "Semiconductor optical amplifier-based heterodyning detection for resolving optical terahertz beat-tone signals from passively mode-locked semiconductor lasers". United States. doi:10.1063/1.3481674.
@article{osti_21470909,
title = {Semiconductor optical amplifier-based heterodyning detection for resolving optical terahertz beat-tone signals from passively mode-locked semiconductor lasers},
author = {Latkowski, Sylwester and Maldonado-Basilio, Ramon and Carney, Kevin and Parra-Cetina, Josue and Philippe, Severine and Landais, Pascal},
abstractNote = {An all-optical heterodyne approach based on a room-temperature controlled semiconductor optical amplifier (SOA) for measuring the frequency and linewidth of the terahertz beat-tone signal from a passively mode-locked laser is proposed. Under the injection of two external cavity lasers, the SOA acts as a local oscillator at their detuning frequency and also as an optical frequency mixer whose inputs are the self-modulated spectrum of the device under test and the two laser beams. Frequency and linewidth of the intermediate frequency signal (and therefore, the beat-tone signal) are resolved by using a photodiode and an electrical spectrum analyzer.},
doi = {10.1063/1.3481674},
journal = {Applied Physics Letters},
number = 8,
volume = 97,
place = {United States},
year = 2010,
month = 8
}
  • We report the observation of bursts of transform-limited 0.65-psec pulses at 1-GHz repetition rates by passive mode locking of a buried optical guide laser in an external cavity. The lasers contain a saturable absorber at the exit facet, specifically introduced by 600-keV proton bombardment at a 3 x 10/sup 15/- cm/sup -2/ dosage level.
  • Using the time domain master equation for a complex electric-field pulse envelope, we find analytical results for the optical spectra of passively mode-locked semiconductor lasers. The analysis includes the effect of optical nonlinearity of semiconductor lasers, which is characterized by a slow saturable amplifier and absorber. Group velocity dispersion, bandwidth limiting, and self-phase modulation were considered as well. The FWHM of the spectrum profile was found to have a strong dependence on group velocity dispersion and self-phase modulation. For large absolute values of the chirp parameter, the optical spectra result in equispaced continuous wave frequencies, a large fraction of whichmore » have equal power. {copyright} 1997 Optical Society of America« less
  • We report on self-starting passively mode-locked diode-pumped 1.3-{mu}m lasers obtained by use of semiconductor saturable absorbers. We achieved pulses as short as 4.6 ps in Nd:YVO{sub 4} and 5.7 ps in Nd:YLF with average output powers of 50 and 130 mW, respectively. {copyright} {ital 1996 Optical Society of America.}
  • The effect of optical feedback on the stability of the mode-locking frequency of monolithic, passively mode-locked semiconductor lasers at [approximately]50 GHz is investigated. Optical feedback leads to linewidth narrowing, frequency pulling, and multiple modes of the intensity modulation in mode-locked lasers, reminiscent of similar effects on the optical frequency in conventional continuous wave (CW) lasers. The narrowest observed line had a full-width-at-half-maximum (FWHM) of 56 kHz, which represents close to two orders of magnitude reduction of the linewidth compared to the situation without feedback. The effects of the optical feedback vary periodically as the length of the feedback delay ismore » varied, with a periodicity that roughly matches the mode locking wavelength. This wavelength is on the order of millimeters, which makes the mechanical stability of the optical feedback loop relatively uncritical.« less
  • The generation of uniform soliton pulse trains by additive pulse mode locking has been experimentally demonstrated in a birefringent fiber laser with a passive polarizer. Numerical simulations of pulse propagation around such a fiber loop are presented which reveal that this mode-locking scheme does not result in strictly uniform pulse trains. Rather, the train of output pulses exhibits periodic fluctuations in intensity and polarization. A model for the pulse dynamics is developed which shows that these fluctuations depend on the strength of the fiber birefringence and the alignment of the polarizer with the fast-and slow-polarization axes of the fiber. Itmore » is also shown that increased uniformity of pulse trains is achieved with near alignment of the polarizer with the slow axis of the birefringence.« less