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Journal of Modern Optics

Answer to Comment on Noiseless amplification in cavitybased optical systems with an internal two-photon process. II. Self-frequency-doubling laser and second-harmonic generation, self-down-converting laser`

A. Pregnolato, Lorenzo Spinelli, Luigi A. Lugiato, Игорь Евгеньевич Проценко

Published Mar 1, 1997• 0 citations
Publisher
DOI
10.1080/09500349708232929

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Comment on Noiseless amplification in cavity-based optical systems with an internal two-photon process. II. Self-frequency-doubling laser and second-harmonic generation, self-down-converting laser`

Andrew G. White, Timothy C. Ralph, Hans‐A. Bachor

Abstract We consider a cavity containing both a χ(2)-nonlinear material and a laser two-level medium for the cases of self-frequency-doubling and self-down-converting configurations. For both situations, the squeezing properties of the two fields are analysed in detail, while special attention is devoted to the problem of ‘noiseless amplification’ of a small monochromatic signal injected in the lower frequency mode.

Journal of Modern Optics•Mar 1, 1997•1 citation

Noiseless amplification in cavity-based optical systems with an internal two-photon process. II. Self-frequency-doubling laser and second-harmonic generation, self-down-converting laser

A. Pregnolato, Lorenzo Spinelli, Luigi A. Lugiato +1 more

We consider a cavity containing both a χ(2)-nonlinear material and a laser two-level medium for the cases of self-frequency-doubling and self-down-converting configurations. For both situations, the squeezing properties of the two fields are analysed in detail, while special attention is devoted to the problem of ‘noiseless amplification’ of a small monochromatic signal injected in the lower frequency mode.

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Noiseless amplification in cavity-based optical systems with an internal two-photon process.

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Squeezed light from a laser with an internal χ(2) -nonlinear element

Rüdiger Schack, Andreas Sizmann, Axel Schenzle

We present a theoretical investigation of the potential for squeezing of a doubly resonant cavity that contains a laser medium as well as a ${\mathrm{\ensuremath{\chi}}}^{(2)}$ nonlinearity. If the lasing mode is coupled to its second harmonic, i.e., for a self-frequency-doubling laser, we find more than 60% squeezing in the up-converted mode outside the cavity. In the opposite case of a ``self-down-converting laser,'' i.e., when the lasing mode is coupled to its subharmonic, a perfectly squeezed vacuum in the down-converted mode develops into a less squeezed state with a nonvanishing coherent amplitude as the pump rate is increased. Our analysis extends beyond the first stable regime of the classical dynamics and compares results for different laser models.

Physical Review A•Jun 1, 1991•20 citations
We present here a possible high-flux photon-pair source constructed by single lithium niobate optical superlattice (OSL) with a combined quasi-periodically and periodically poled structure, which is from the principle of electrically induced parametric down conversion (PDC) after second-harmonic generation (SHG), predicted by the united theory developed in this paper, in which SHG, PDC and electro-optic (EO) effect are comparably treated as two-order nonlinear effects. In the OSL, the e-polarized fundamental frequency photons are first converted to double frequency ones with the same polarization; then the PDC process is triggered by EO effect when the fundamental frequency photons are almost exhausted; finally, the double frequency photons are converted again to a series of two-photon pair of fundamental wave. It is demonstrated that at 100 degrees C, in a 20.2mm long OSL with a 30V / mm applied electric field, a 100MW/cm(2), 1080 nm laser beam can be translated to a flux of high-purity two-photon pairs with a conversion efficiency close to 100%; and for a longer OSL the pump intensity can be further lowered. The device can also act as an ultra-low field electro-optic switch.
We present a theoretical investigation of the potential for squeezing of a doubly resonant cavity that contains a laser medium as well as a ${\mathrm{\ensuremath{\chi}}}^{(2)}$ nonlinearity. If the lasing mode is coupled to its second harmonic, i.e., for a self-frequency-doubling laser, we find more than 60% squeezing in the up-converted mode outside the cavity. In the opposite case of a ``self-down-converting laser,'' i.e., when the lasing mode is coupled to its subharmonic, a perfectly squeezed vacuum in the down-converted mode develops into a less squeezed state with a nonvanishing coherent amplitude as the pump rate is increased. Our analysis extends beyond the first stable regime of the classical dynamics and compares results for different laser models.