• Title/Summary/Keyword: Schrodinger equation

Search Result 52, Processing Time 0.017 seconds

Propagation and interaction of two dimensional solitary waves in organic single crystal of polydiacetylene para-toluene sulfonate (유기단결정 Polydiacetylene Para-toluene Sulfonate에서 2차원 공간고립파의 진행과 상호 작용 전산모의)

  • 류재명;조재흥;황보창권;정진호
    • Korean Journal of Optics and Photonics
    • /
    • v.13 no.5
    • /
    • pp.400-407
    • /
    • 2002
  • Two dimensional solitary waves are stably propagated in a saturable medium which has a saturable nonlinear index as input intensity. However, in the case of low intensity. a negative fifth-order nonlinear medium has properties of a saturable medium. So a Gaussian beam travels stably. The propagation process into the fifth order nonlinear medium of the Gaussian beam with a weak intensity is investigated by using the computer simulation of the two-dimensional nonlinear Schrodinger equation. As a result, it is confirmed that the two-dimensional spatial solitary waves are stably propagated in this medium when the incident powers are self-trapping powers. In the condition of the phase difference and collisional angle between two input beams of 180 degree and 0.05 degree, respectively, we can confirm that all optical switching is as simple as controlling the incident power of one input beam.

Proposan and Analysis of DR(Distributed Reflector)-LD/EA(electro-absorption)­Modulator Integrated Device (분포반사기 레이저 다이오드와 광흡수 변조기가 집적된 소자의 제안 및 해석)

  • 권오기;심종인
    • Korean Journal of Optics and Photonics
    • /
    • v.9 no.5
    • /
    • pp.333-341
    • /
    • 1998
  • The novel integrated device, 1.55 ${\mu}{\textrm}{m}$ DR-LD(distrbuted reflector laser diode) integrated EA-MOD (electro-absorption modulator) as light source, is proposed to improve the device yield and its operational performances. This device can be easily fabricated by the selective MOVPE technique and its fabrication processes are almost the same as the reported 1.55 ${\mu}{\textrm}{m}$ DFB-LD(distributed feedback laser diode) integrated EA-MOD except the asymmetric gratings. The static and dynamic properties are investigated simultaneously by solving the transfer matrix method for light propagation, the time-dependent rate equation for carrier change and schr$\"{o}$dinger equation for QCSE (Quantum-Confined Stark Effect). The performances of the proposed device such as output power, chirp, and extinction ratio are compared with those of DFB-LD integrated EA-MOD. Under 10Gb/s NRZ modulation, we obtain that DR-LD integrated EA-MOD. is 30% higher in output power on the on-state, about 50% lower in chirp, and slightly larger in extinction ratio than DFB-LD integrated EA-MOD.-MOD.

  • PDF