Small-signal equivalent circuit model of photonic crystal fano laser

Aref Rasoulzadehzali, M. K Moravvej-Farshi, Mohammed Hassan Yavari

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

We develop a new small-signal equivalent circuit model for photonic crystal Fano laser based on standard linearized equations. The results are compared with those obtained by the numerical simulation approach. This novel circuit model being a cost-effective fast tool is advantageous over solving the rate equations for designing and extending the photonic crystal Fano laser. Using this circuit model, we have investigated the laser current modulation via the conventional method and via modulating the Fano mirror. The results show that the bandwidths of the amplitude modulation of the laser through-port and the frequency modulation of its cross port are both in the range of THz. It is also shown that the larger the nanocavity detuning, the greater the relaxation oscillation frequency, increasing the possibility of widening the laser bandwidth, through which the modulation efficiency may decrease. Moreover, we show that the longer the laser active region, the narrower the modulation response bandwidth. The results show that the circuit model accurately explains the photonic crystal Fano laser small-signal modulation characteristics.
Original languageEnglish
Article number8642943
Number of pages8
JournalIEEE Journal of Selected Topics in Quantum Electronics
Volume25
Issue number6
DOIs
Publication statusPublished - 1 Nov 2019
Externally publishedYes

Fingerprint

Photonic crystals
equivalent circuits
Equivalent circuits
photonics
Lasers
crystals
lasers
Modulation
modulation
bandwidth
Bandwidth
Networks (circuits)
Amplitude modulation
Frequency modulation
frequency modulation
Mirrors
mirrors
costs
oscillations
Computer simulation

Keywords

  • Circuit model
  • Fano resonance
  • laser dynamics
  • laser modulation
  • photonic crystal Fano laser
  • small signal modulation

Cite this

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title = "Small-signal equivalent circuit model of photonic crystal fano laser",
abstract = "We develop a new small-signal equivalent circuit model for photonic crystal Fano laser based on standard linearized equations. The results are compared with those obtained by the numerical simulation approach. This novel circuit model being a cost-effective fast tool is advantageous over solving the rate equations for designing and extending the photonic crystal Fano laser. Using this circuit model, we have investigated the laser current modulation via the conventional method and via modulating the Fano mirror. The results show that the bandwidths of the amplitude modulation of the laser through-port and the frequency modulation of its cross port are both in the range of THz. It is also shown that the larger the nanocavity detuning, the greater the relaxation oscillation frequency, increasing the possibility of widening the laser bandwidth, through which the modulation efficiency may decrease. Moreover, we show that the longer the laser active region, the narrower the modulation response bandwidth. The results show that the circuit model accurately explains the photonic crystal Fano laser small-signal modulation characteristics.",
keywords = "Circuit model, Fano resonance, laser dynamics, laser modulation, photonic crystal Fano laser, small signal modulation",
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Small-signal equivalent circuit model of photonic crystal fano laser. / Rasoulzadehzali, Aref; Moravvej-Farshi, M. K; Yavari, Mohammed Hassan.

In: IEEE Journal of Selected Topics in Quantum Electronics, Vol. 25, No. 6, 8642943, 01.11.2019.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Rasoulzadehzali, Aref

AU - Moravvej-Farshi, M. K

AU - Yavari, Mohammed Hassan

PY - 2019/11/1

Y1 - 2019/11/1

N2 - We develop a new small-signal equivalent circuit model for photonic crystal Fano laser based on standard linearized equations. The results are compared with those obtained by the numerical simulation approach. This novel circuit model being a cost-effective fast tool is advantageous over solving the rate equations for designing and extending the photonic crystal Fano laser. Using this circuit model, we have investigated the laser current modulation via the conventional method and via modulating the Fano mirror. The results show that the bandwidths of the amplitude modulation of the laser through-port and the frequency modulation of its cross port are both in the range of THz. It is also shown that the larger the nanocavity detuning, the greater the relaxation oscillation frequency, increasing the possibility of widening the laser bandwidth, through which the modulation efficiency may decrease. Moreover, we show that the longer the laser active region, the narrower the modulation response bandwidth. The results show that the circuit model accurately explains the photonic crystal Fano laser small-signal modulation characteristics.

AB - We develop a new small-signal equivalent circuit model for photonic crystal Fano laser based on standard linearized equations. The results are compared with those obtained by the numerical simulation approach. This novel circuit model being a cost-effective fast tool is advantageous over solving the rate equations for designing and extending the photonic crystal Fano laser. Using this circuit model, we have investigated the laser current modulation via the conventional method and via modulating the Fano mirror. The results show that the bandwidths of the amplitude modulation of the laser through-port and the frequency modulation of its cross port are both in the range of THz. It is also shown that the larger the nanocavity detuning, the greater the relaxation oscillation frequency, increasing the possibility of widening the laser bandwidth, through which the modulation efficiency may decrease. Moreover, we show that the longer the laser active region, the narrower the modulation response bandwidth. The results show that the circuit model accurately explains the photonic crystal Fano laser small-signal modulation characteristics.

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