Listar FCA_Articles por autoría "64e866a3-c6ff-4ed3-9517-e8130bf70786"
Mostrando ítems 1-13 de 13
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20 GHz arbitrary radio-frequency waveform generator based on incoherent pulse shaping
Torres Company, Víctor; Andrés, Pedro; Lancis, Jesús; Chen, Lawrence R. Optical Society of America (2008)We demonstrate a new approach of photonically assisted radiofrequency (RF) waveform generation using a spectrally incoherent light source. The system is based on the so-called generalized frequency-to-time mapping ... -
Dispersion requirements in coherent frequency-to-time mapping
Torres Company, Víctor; Leaird, Daniel E.; Weiner, Andrew M. Optical Society of America (2011)The frequency-to-time mapping technique (also known as the temporal far-field phenomenon) usually requires a significant amount of dispersion to stretch an ultrashort optical pulse so that the intensity profile becomes ... -
Fiber transmission and generation of ultrawideband pulses by direct current modulation of semiconductor lasers and chirp-to-intensity conversion
Torres Company, Víctor; Prince, Kamau; Tafur Minroy, Idelfonso Optical Society of America (2008-02-01)Optical pulses generated by current modulation of semiconductor lasers are strongly frequency chirped. This effect has been considered pernicious for optical communications. We take advantage of this effect for the generation ... -
Ghost interference with classical partially coherent light pulses
Lajunen, Hanna; Lancis, Jesús; Friberg, Ari T.; Torres Company, Víctor American Physical Society (2008)The two-photon temporal coincidence detection amplitude obeys a pair of equations identical to those of classical partially coherent plane-wave pulses propagating in linearly dispersive media. These equations are also ... -
Lossless equalization of frequency combs
Torres Company, Víctor; Lancis, Jesús; Andrés, Pedro Optical Society of America (2008)Frequency combs obtained by sinusoidal phase modulation of narrow-band continuous-wave lasers are widely used in the field of optical communications. However, the resulting spectral envelope of the comb is not at. ... -
Multichannel Radio-Frequency Arbitrary Waveform Generation Based on Multiwavelength Comb Switching and 2-D Line-by-Line Pulse Shaping
Torres Company, Víctor; Metcalf, Andrew J.; Leaird, Daniel E.; Weiner, Andrew M. IEEE (2012-06)We demonstrate a multichannel time-multiplexed radio-frequency arbitrary waveform generator. The system combines a switching scheme of multiwavelength optical frequency combs with a novel 2-D line-by-line pulse shaper ... -
Multitap microwave photonic filters with programmable phase response via optical frequency comb shaping
Song, Minhyup; Torres Company, Víctor; Metcalf, Andrew J.; Weiner, Andrew M. Optical Society of America (2012)We present a programmable multitap microwave photonic filter with an arbitrary phase response operating over a broad bandwidth. Complex coefficient taps are achieved by optical line-by-line pulse shaping on a 10 GHz flat ... -
Noise Comparison of RF Photonic Filters Based on Coherent and Incoherent Multiwavelength Sources
Song, Minhyup; Torres Company, Víctor; Weiner, Andrew M. IEEE (2012)A filtered microwave photonic (MWP) link implemented with an optical frequency comb as a multitap optical source offers a significant improvement in noise characteristics when compared to a spectrally sliced broadband incoherent ... -
Reconfigurable RF-Waveform Generation Based on Incoherent-Filter Design
Andrés, Pedro; Lancis, Jesús; Torres Company, Víctor; Chen, Lawrence R. Institute of Electrical and Electronics Engineers (2008)Radio-frequency (RF) waveform generators are key devices for a variety of applications, including radar, ultra-wideband communications, and electronic test measurements. Following advances in broadband coherent pulsed ... -
Resolution-enhanced optical coherence tomography based on classical intensity interferometry
Lajunen, Hanna; Torres Company, Víctor; Lancis, Jesús; Friberg, Ari T. Optical Society of America (2009)We propose a fourth-order interference scheme for optical coherence tomography operating with broadband incoherent (or quasi-incoherent) light. It is shown that using this proposal, an axial resolution improvement by a ... -
Simultaneous broadband microwave downconversion and programmable complex filtering by optical frequency comb shaping
Torres Company, Víctor; Leaird, Daniel E.; Weiner, Andrew M. Optical Society of America (2012)High-repetition-rate optical frequency combs can act as broadband photonic mixers and downconvert a microwave signal to an intermediate frequency (IF) band so that it becomes accessible with high-speed electronics. In this ... -
Spectral broadening enhancement in silicon waveguides through pulse shaping
Castelló Lurbe, David; Silvestre, Enrique; Andrés, Pedro; Torres Company, Víctor Optical Society of America (2012)Spectral broadening in silicon waveguides is usually inhibited at telecom wavelengths due to some adverse effects related to semiconductor dynamics, namely, two-photon and free-carrier absorption (FCA). In this Letter, our ... -
Unified approach to describe optical pulse generation by propagation of periodically phase-modulated CW laser light
Torres Company, Víctor; Lancis, Jesús; Andrés, Pedro Optical Society of America (2006)The analysis of optical pulse generation by phase modulation of narrowband continuous-wave light, and subsequent propagation through a group-delay-dispersion circuit, is usually performed in terms of the socalled bunching ...