Reduction of phase noise in passively mode-locked lasers

Walker, Daniel A.; Crust, D.W.; Sleat, W. E.; Sibbett, W.

doi:10.1109/3.119526

Cited by 44 publications

(11 citation statements)

References 20 publications

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“…Experimental verification of the low timing jitter of mode-locked lasers started as early as 1986 [7][8][9][10]. Optical techniques for timing jitter measurements, such as the recently introduced balanced optical cross-correlation technique [5], confirmed that passively modelocked lasers show jitter levels of less than 3 fs for standard fiber lasers [11,12] and about 10 as for solid-state lasers due to their shorter pulses, higher intracavity pulse energy and lower intracavity loss [13].…”

Section: Timing Jitter Of Rf and Photonic Sourcesmentioning

confidence: 88%

Photonic ADC: overcoming the bottleneck of electronic jitter

Khilo¹,

Spector²,

Grein³

et al. 2012

Opt. Express

426

229

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Accurate conversion of wideband multi-GHz analog signals into the digital domain has long been a target of analog-to-digital converter (ADC) developers, driven by applications in radar systems, software radio, medical imaging, and communication systems. Aperture jitter has been a major bottleneck on the way towards higher speeds and better accuracy. Photonic ADCs, which perform sampling using ultra-stable optical pulse trains generated by mode-locked lasers, have been investigated for many years as a promising approach to overcome the jitter problem and bring ADC performance to new levels. This work demonstrates that the photonic approach can deliver on its promise by digitizing a 41 GHz signal with 7.0 effective bits using a photonic ADC built from discrete components. This accuracy corresponds to a timing jitter of 15 fs -a 4-5 times improvement over the performance of the best electronic ADCs which exist today. On the way towards an integrated photonic ADC, a silicon photonic chip with core photonic components was fabricated and used to digitize a 10 GHz signal with 3.5 effective bits. In these experiments, two wavelength channels were implemented, providing the overall sampling rate of 2.1 GSa/s. To show that photonic ADCs with larger channel counts are possible, a dual 20-channel silicon filter bank has been demonstrated. 289-296 (1992). 11. J. Kim, J. Chen, J. Cox, and F. X. Kärtner, "Attosecond-resolution timing jitter characterization of free-running mode-locked lasers using balanced optical cross-correlation," Opt. Lett. microwave signals at 40-GHz with higher than 7-ENOB resolution," Opt. ©2012 Optical Society of America

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Section: Timing Jitter Of Rf and Photonic Sourcesmentioning

confidence: 88%

Photonic ADC: overcoming the bottleneck of electronic jitter

Khilo¹,

Spector²,

Grein³

et al. 2012

Opt. Express

426

229

View full text Add to dashboard Cite

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“…These noise levels are the lowest reported to date for passively mode-locked lasers [128][129][130][131][132][133][134][135]. (Valid comparison of the timing jitter of different lasers relies on use of the same measurement time.)…”

Section: Noise In P-apm Fiber Lasersmentioning

confidence: 97%

Ultrashort-pulse fiber ring lasers

Nelson¹,

Jones²,

Tamura³

et al. 1997

Applied Physics B: Lasers and Optics

756

385

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Abstract. This paper reviews recent progress on ultrashort pulse generation with erbium-doped fiber ring lasers. The passive mode-locking technique of polarization additive pulse mode-locking (P-APM) is used to generate stable, selfstarting, sub-500 fs pulses at the fundamental repetition rate from a unidirectional fiber ring laser operating in the soliton regime. Saturation of the APM, spectral sideband generation, and intracavity filtering are discussed. Harmonic modelocking of fiber ring lasers with soliton pulse compression is addressed, and stability regions for the solitons are mapped and compared with theoretical predictions. The stretchedpulse laser, which incorporates segments of positive-and negative-dispersion fiber into the P-APM fiber ring, generates shorter (sub-100 fs) pulses with broader bandwidths (> 65 nm) and higher pulse energies (up to 2.7 nJ). We discuss optimization of the net dispersion of the stretched-pulse laser, use of the APM rejection port as the laser output port, and frequency doubling for amplifier seed applications. We also review the analytical theory of the stretched-pulse laser as well as discuss the excellent noise characteristics of both the soliton and stretched-pulse lasers. 42.60F; 42.65; 42.80 Fiber lasers were made possible in the 1960s by the incorporation of trivalent rare-earth ions such as neodymium, erbium, and thulium into glass hosts [1]. Soon thereafter neodymium was incorporated into the cores of fiber waveguides [2,3]. Due to the high efficiency of the Nd +3 ion as a laser, early work focused on Nd +3 -doped silica fiber lasers operating at 1.06 µm [4]. Doping of silica fibers with Er +3 ions was not achieved until the 1980s [5,6]. Since that time Er +3 -doped fiber lasers have received much attention, because the lasing wavelength at 1.55 µm falls within the low-loss window of optical fibers and thus is suitable for optical fiber communications. Rare-earth ions such as Ho +3 [7,8], Tm +3 [9-11], and * Current address: Lucent Technologies/Bell Labs, 791 Holmdel-Keyport Road, Holmdel, NJ, USA * * Current address: NTT Access Network Systems Laboratory, Tokai-mura, Naka-gun, Ibaraki-ken 319-11, Japan Yb +3 [12,13] have also been used as dopants or co-dopants in silica or fluoride fibers, allowing new lasing or pumping wavelengths, and Pr +3 has been incorporated into fluoride fiber, providing emission at 1.3 µm [14,15]. PACS:Among the numerous advantages of fiber lasers are simple doping procedures, low loss, and the possibility of pumping with compact, efficient diodes. The fiber itself provides the waveguide, and the availability of various fiber components minimizes the need for bulk optics and mechanical alignment. Many different cavity configurations can be easily built with fibers and fused-fiber couplers, including linear FabryPerot, ring, and combinations of the two. Enhancement of the fiber nonlinearity due to large signal intensities and long interaction lengths is an additional advantage of fiber lasers that is particularly important for mode-locki...

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“…Other techniques include hybrid stabilization using optical feedback from a fiber-optical cavity resulting in a beat frequency linewidth reduction by a factor of [4]. Reduction of timing jitter of a ring dye laser by a factor of 2.2 (5 kHz-50 kHz) by referencing the cavity frequency to an external resonator has been reported [5]. Timing jitter reduction of a mode-locked semiconductor laser by referencing to an external atomic clock by a factor of 10 (1 Hz-100 MHz) has been reported [6].…”

mentioning

confidence: 99%

Investigations of Repetition Rate Stability of a Mode-Locked Quantum Dot Semiconductor Laser in an Auxiliary Optical Fiber Cavity

Breuer

Elsaer

McInerney

et al. 2010

IEEE J. Quantum Electron.

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Abstract-We have investigated experimentally the pulse train (mode beating) stability of a monolithic mode-locked multi-section quantum-dot laser with an added passive auxiliary optical fiber cavity. Addition of the weakly coupled ( 24 dB) cavity reduces the current-induced shift of the principal peak in the RF spectrum (the effective pulse repetition frequency) by more than an order of magnitude, from 39 5 to 2 3 kHz/mA. The rms timing jitter of the pulse train is simultaneously reduced from 1.4 to 0.9 ps.

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Reduction of phase noise in passively mode-locked lasers

Cited by 44 publications

References 20 publications

Photonic ADC: overcoming the bottleneck of electronic jitter

Photonic ADC: overcoming the bottleneck of electronic jitter

Ultrashort-pulse fiber ring lasers

Investigations of Repetition Rate Stability of a Mode-Locked Quantum Dot Semiconductor Laser in an Auxiliary Optical Fiber Cavity

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