A multi-GHz chaotic optoelectronic oscillator based on laser terminal voltage

Chang, C. Y.; Choi, Daeyoung; Locquet, Alexandre; Wishon, Michael J.; Merghem, K.; Ramdane, A.; Lelarge, F.; Martinez, A.; Citrin, D. S.

doi:10.1063/1.4948761

Cited by 23 publications

(25 citation statements)

References 28 publications

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“…© 2017 Optical Society of America Semiconductor lasers subject to perturbations exhibit a wide range of nonlinear dynamics for the generation of a number of photonic microwave signals [1][2][3][4]. The most investigated perturbation is through optical feedback because of the simplicity as well as the high dimensionality [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Optical feedback induces nonlinear dynamics as in the stable, periodic, quasiperiodic, and chaotic states.…”

mentioning

confidence: 99%

“…The periodic state normally gives regular pulsation at microwave frequencies, where mode-locked pulses were recently obtained using quantum-dot lasers [18,19]. The quasi-periodic state outputs pulses with modulated amplitudes [14,20]. The chaotic state generates broadband microwave signals for niche applications, such as random bit generation, secure communication, and target ranging [21][22][23].…”

mentioning

confidence: 99%

“…4(c) as ξ increases to 0.027, the switch to the periodic state is postponed to t 0.9τ for a further reduced duty cycle of 0.1. State switching enables not only square-wave modulated photonic microwave generation [2,14], but also a continuous tuning of the duty cycle. For small ξ, the laser remains solely in the stable state without any switching, so the duty cycle for the periodic state is zero.…”

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Tunable switching between stable and periodic states in a semiconductor laser with feedback

2017

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Feedback-induced switching between two nonlinear dynamical states is observed in a semiconductor laser. The single-mode laser is subject to optical feedback in the long-cavity regime. In every round-trip time τ, the feedback is found to switch the laser from a stable state to a periodic state. The stable state corresponds to a continuous-wave emission at a single optical frequency. The periodic state corresponds to emission at another optical frequency with sidebands generated from a sustained relaxation oscillation. Such regular switching between the stable and periodic states is first unveiled numerically. Experimentally, the resultant intensity time series is confirmed as comprising of a square-wave envelope repeating in τ, which is modulated on a microwave carrier near the relaxation resonance frequency. Additionally, the duty cycle for the periodic state is found as continuously tunable by adjusting the feedback strength. The tunable state switching is applicable to square-wave modulated photonic microwave generation.

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Tunable switching between stable and periodic states in a semiconductor laser with feedback

2017

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“…The optical intensity I is monitored with a fast photodetector, and a multimeter is used to determine the DC component, V DC , of the laser voltage. In the case of unpackaged lasers, the AC voltage across the laser diode, V AC , is measured with a real-time oscilloscope (OSC) and enables the monitoring of the charge carrier density [14,15]. The optical spectrum is tracked with a high-resolution optical spectrum analyzer.…”

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confidence: 99%

Routes to Chaos of a Semiconductor Laser Subjected to External Optical Feedback: A Review

Locquet

2020

Photonics

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This paper reviews experimental investigations of the route to chaos of a semiconductor laser subjected to optical feedback from a distant reflector. When the laser is biased close to threshold, as the feedback strength is increased, an alternation between stable continuous wave (CW) behavior and irregular, chaotic fluctuations, involving numerous external-cavity modes, is observed. CW operation occurs on an external-cavity mode whose optical frequency is significantly lower than that of the solitary laser. The scenario is significantly different for larger currents as the feedback level is increased. At low feedback, the laser displays periodic or quasiperiodic behavior, mostly around external-cavity modes whose frequency is slightly larger than that of the solitary laser. As the feedback level increases, the RF and optical frequencies involved progressively lock until complete locking is achieved in a mixed external-cavity mode state. In this regime, the optical intensity and voltage oscillate at a frequency that is also equal to the optical frequency spacing between the modes participating in the dynamics. For even higher feedback, the locking cannot be maintained and the laser displays fully developed coherence collapse.

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“…[6], a change in self-modulation frequency in a periodic regime was detected via the frequency of the LD terminal voltage V . Also, the voltage V can be used to probe the carrier dynamics in the active region of a LD [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Reading bits on a CD‐ROM without a photodiode

Wishon

Locquet

Mourozeau

et al. 2017

IET Optoelectronics

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Abstract:We demonstrate that the bits of a CD-ROM can be read without a photodiode (PD). A commercial CD-ROM drive was used and left unmodified except a beam splitter was removed which would route the light to a PD. This allowed for the reflected light to be incident on the laser within the laser package itself. By monitoring fluctuations in the voltage across the laser diode (LD) under constant-current injection, it was possible to read and interpret the bits from a spinning CD-ROM.

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A multi-GHz chaotic optoelectronic oscillator based on laser terminal voltage

Cited by 23 publications

References 28 publications

Tunable switching between stable and periodic states in a semiconductor laser with feedback

Tunable switching between stable and periodic states in a semiconductor laser with feedback

Routes to Chaos of a Semiconductor Laser Subjected to External Optical Feedback: A Review

Reading bits on a CD‐ROM without a photodiode

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