Two-photon gain semiconductor amplifier

Ironside, C. N.

doi:10.1109/3.135201

Cited by 46 publications

(26 citation statements)

References 16 publications

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“…These include the estimation of modal non-linear coefficients for multiphoton absorption, or two photon gain [31]. Waveguides having circular symmetry (such as optical fibres) can also be analysed in a similar fashion, although normal fibres would not be expected to have any unusual properties, since the constituent materials usually have similar non-linear coefficients, and confinement factors approaching one.…”

Section: Discussionmentioning

confidence: 99%

Effective non-linear coefficients of optical waveguides

Grant

1996

Optical and Quantum Electronics

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Using the weakly guiding approximation, and with the assumption that the nonlinearities are sufficiently weak so as not to change the transverse mode profile, perturbation theory is used to derive simple expressions for evaluating the modal, or effective, non-linear coefficients of optical waveguide structures based on the non-linear coefficients of the constituent materials. In particular, the third-order and fifth-order optical non-linearities of refraction and absorption are discussed. The expressions are used to estimate the effective modal non-linear refraction coefficients for various types of slab waveguides, focusing primarily on femtosecond refractive non-linearities in semiconductor amplifiers, including quantum-well structures. The results are of particular relevance to the design of all-optical switches based on these effects.

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Section: Discussionmentioning

confidence: 99%

Effective non-linear coefficients of optical waveguides

Grant

1996

Optical and Quantum Electronics

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“…Additionally, this large enhancement of 2PA coefficient translates directly to enhanced 2-photon gain [10], which opens the possibility of highly nondegenerate 2-photon tunable laser and amplifier device applications [11]. However, it remains to be seen if the strong enhancement in two-photon emission would be sufficient to overcome the large free-carrier losses of the infrared wave in such devices.…”

Section: Discussionmentioning

confidence: 99%

Extremely nondegenerate two-photon detection of sub-bandgap pulses

Cirloganu

Fishman

Webster

et al. 2011

2011 International Quantum Electronics Conference (IQEC) and Conference on Lasers and Electro-Optics (CLEO) Pacific Rim Incorpo

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“…We derived Eqs. (7) and (8) without making any assumptions of specific band structure or layer design, leaving us with a general expression for ND-2PA coefficients in quasi-2D materials. Later, we make approximations to simplify calculations for the symmetric quantum wells introduced in the next section.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Nondegenerate two-photon absorption in GaAs/AlGaAs multiple quantum well waveguides

Cox

Wei

Pattanaik

et al. 2020

Phys. Rev. Research

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We present femtosecond pump-probe measurements of the nondegenerate (1960 nm excitation and 1176-1326 nm probe) two-photon absorption spectra of 8 nm GaAs/12 nm Al0.32Ga0.68As quantum well waveguides. Experiments were performed with light pulses co-polarized normal and tangential to the quantum well plane. The results are compared to perturbative calculations of transition rates between states determined by the k · p method with an 8 or 14 band basis. We find excellent agreement between theory and experiment for normal polarization, then use the model to support predictions of orders-of-magnitude enhancement of nondegenerate two-photon absorption as one constituent photon energy nears an intersubband resonance.

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Two-photon gain semiconductor amplifier

Cited by 46 publications

References 16 publications

Effective non-linear coefficients of optical waveguides

Effective non-linear coefficients of optical waveguides

Extremely nondegenerate two-photon detection of sub-bandgap pulses

Nondegenerate two-photon absorption in GaAs/AlGaAs multiple quantum well waveguides

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