Coherence collapse in single-mode semiconductor lasers due to optical feedback

Lenstra, D.; Verbeek, B.H.; Boef, Arie den

doi:10.1109/jqe.1985.1072725

Cited by 457 publications

(140 citation statements)

References 13 publications

Supporting

Mentioning

132

Contrasting

Unclassified

Order By: Relevance

“…Semiconductor lasers show a sudden increase in their spectral linewidth from about 100 MHz to typically several tens of GHz for delay times not much smaller than the relaxation oscillation period and for moderate feedback levels. This phenomenon has been called coherence collapse [6], and has attracted a lot of research (e.g., [7-11]).One dynamical phenomenon within the coherence collapse regime frequently attributed to is the so-called low frequency fluctuations phenomenon (LFF). It refers to fluctuations in the emitted light intensity with distinctly lower frequencies in comparison to the underlying relaxation oscillation frequencies and mode beating frequencies [12 -14].…”

mentioning

confidence: 99%

Fast Pulsing and Chaotic Itinerancy with a Drift in the Coherence Collapse of Semiconductor Lasers

et al. 1996

Self Cite

View full text Add to dashboard Cite

We report the first experimental observation of irregular picosecond light pulses within the coherence collapse of a semiconductor laser subject to delayed moderate optical feedback. This pulsing behavior agrees with the recent explanation of low frequency fluctuations as chaotic itinerancy with a drift. Theory and experiments show very good agreement. PACS numbers: 42.65.Sf, 05.45.+b, 42.55.Px Delayed feedback-induced instabilities have been studied since the late 1970s in various dynamical systems. Besides these very early interests they are nowadays of particular interest because of their intrinsic high dimensionality and, related to that, their rich variety of dynamical phenomena [1]. Optical systems have played an important role for these investigations, and have boosted the interest in high-dimensional nonlinear dynamics [2][3][4].A very popular delay system is the semiconductor laser subject to external optical feedback, because of its high sensitivity to external signals [5]. Semiconductor lasers show a sudden increase in their spectral linewidth from about 100 MHz to typically several tens of GHz for delay times not much smaller than the relaxation oscillation period and for moderate feedback levels. This phenomenon has been called coherence collapse [6], and has attracted a lot of research (e.g., [7-11]).One dynamical phenomenon within the coherence collapse regime frequently attributed to is the so-called low frequency fluctuations phenomenon (LFF). It refers to fluctuations in the emitted light intensity with distinctly lower frequencies in comparison to the underlying relaxation oscillation frequencies and mode beating frequencies [12 -14]. Recently, LFF has been explained as chaotic itinerancy with a drift [15]. This theory predicts erratic picosecond pulsing of the output power. In this paper we give experimental evidence confirming these predictions. We do this by comparing measured intensity pulses with pulse trains obtained by numerical modeling. The very good agreement supports the recent identification of the essential physical mechanism leading to the LFF behavior.The dynamics of a single-mode semiconductor laser subject to moderate amounts of optical feedback from an external reflection is modeled by the following delaydifferential rate equations [5]:Here we have written the complex optical field as E ͑t͒ E͑t͒ exp͑iv 0 t͒ p P͑t͒ exp͑iv 0 t͒, where v 0 is the optical angular frequency of the stand-alone (solitary) laser, P͑t͒ is the photon number, and n͑t͒ is the excess number of electron-hole pairs with respect to the solitary value N 0 . The parameters in (1a) and (1b) have their usual meaning: j is the bulk differential gain, e accounts for gain saturation, a is the linewidth enhancement factor, G 0 is the inverse photon lifetime, pJ th is the electrical pump current (J th is its value at threshold), and T 1 is the electron-hole pair lifetime. The feedback is accounted for via the delay time t and the feedback rate g. The dimensionless effective feedback strength is defined as C ϵ gt p...

show abstract

mentioning

confidence: 99%

Fast Pulsing and Chaotic Itinerancy with a Drift in the Coherence Collapse of Semiconductor Lasers

et al. 1996

Self Cite

View full text Add to dashboard Cite

show abstract

“…A number of impressive studies on electronic feedback and 10 all-optical feedback, and the resulting dynamics in a SCL have been reported over the years [3,4]. Within the context of all-optical feedback, investigators have studied conventional optical feedback where a mirror is placed in front of the SCL such that a fraction of the light from the laser 15 is reflected back into it [5,6]. Other feedback scenarios have included polarization rotated feedback where the polarization of the feedback light is rotated relative to the dominant polarization mode of the laser light [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Effects of quantum noise on the nonlinear dynamics of a semiconductor laser subject to two spectrally filtered, time-delayed optical feedbacks

Suelzer

Prasad

Ghosh

et al. 2016

Optics Communications

View full text Add to dashboard Cite

“…Semiconductor lasers subject to optical feedback from an external mirror have been extensively investigated both theoretically [1][2][3] and experimentally. 4,5 It has been shown that as a result of the delayed feedback, the lasers can exhibit a variety of interesting features, including the destabilization of relaxation oscillations, 6-9 coherence collapse, 10 and low-frequency fluctuations (LFF) or dropouts. 1,11 Physically, a nonlinear system with delayed feedback has infinite solutions, whose behaviors need to be explained in terms of the nonlinear dynamics.…”

mentioning

confidence: 99%

“…This effect has also been called coherence collapse. 10 The center wavelength of the laser under LFF emission is 774 nm.…”

mentioning

confidence: 99%

Periodic dark pulse emission induced by delayed feedback in a quantum well semiconductor laser

Tang

et al. 2012

AIP Advances

View full text Add to dashboard Cite

Coherence collapse in single-mode semiconductor lasers due to optical feedback

Cited by 457 publications

References 13 publications

Fast Pulsing and Chaotic Itinerancy with a Drift in the Coherence Collapse of Semiconductor Lasers

Fast Pulsing and Chaotic Itinerancy with a Drift in the Coherence Collapse of Semiconductor Lasers

Effects of quantum noise on the nonlinear dynamics of a semiconductor laser subject to two spectrally filtered, time-delayed optical feedbacks

Periodic dark pulse emission induced by delayed feedback in a quantum well semiconductor laser

Contact Info

Product

Resources

About