Integrated-optic acoustically tunable infra-red optical filter

Heffner, B.L.; Smith, David A.; Baran, J. E.; Yi‐Yan, A.; Cheung, Kmc

doi:10.1049/el:19881065

Cited by 81 publications

(18 citation statements)

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“…These devices have to switch from one wavelength to another very quickly to match the continuous changes in the network traffic. Tunable filters are the subject of intensive research and a wide variety of techniques are studied: tunable Bragg gratings (often in acousto-optic (AO) cells using surface waves [7][8][9] but also in fibers [10 -13]), tunable Fabry-Perot [14 -19] and diffraction gratings associated to steering devices like micromirrors [20 -22] or deflectors [23,24].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of a high-resolution fast tunable filter based on an intracavity Bragg grating

Bitauld¹,

Zaquine²,

Maruani³

et al. 2007

Appl. Opt.

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A fast tunable filtering technique is proposed associating a diffraction grating with an intracavity Bragg grating. The bandwidth and the tuning range of this filter can be easily adapted by changing the diffraction grating's orientation, or its period, and its response is uniform over the whole tuning range. A numerical simulation of the filter response to a Gaussian beam has been developed, and it fits the experimental results allowing a calculation of the performances that could be obtained with more specific elements. For example, using a commercial acousto-optic deflector would allow a separation of 500 frequencies. It would then be possible to have a tuning range of 100 nm with a bandwidth of 0.2 nm for optical telecommunications.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis of a high-resolution fast tunable filter based on an intracavity Bragg grating

Bitauld¹,

Zaquine²,

Maruani³

et al. 2007

Appl. Opt.

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“…The use of acousto-optically tunable filters and switches in LiNbO 3 have potential applications in wavelength division multiplexed (WDM) optical networks [1]. It is probably the only known tunable filter that is capable of selecting several wavelengths simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Acousto-Optic Tunable Filter (AOTF) Revisited: Ultrashort Optical Pulses Crosstalk Studies on the Lossy Filter

Sobrinho

Filho

Sales

et al. 2006

Fiber and Integrated Optics

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We examine again the crosstalk level (Xtalk) and extinction ratio (Xratio) of an acousto-optic tunable filter (AOTF) operating with ultrashort light pulses (2 ps), now considering the loss effect. The compression factor was studied for the switched pulse with lossy AOTF (α dB = 4 dB/mm) considering five nonlinearity profiles. One can observe that there is always an optimum value for δ (final value of the nonlinearity) that one can obtain a switched pulse with the same time duration of the input pulse (C = 1). The compression factor for the switched pulse along the filter length shows that for the constant profile, the compression factor is around 1 all over the device. The study of the crosstalk level (Xtalk) of this device, considering the optimum values of δ obtained from the compression studies, as a function of the pump power (P 0 ) was done. The acousto-optic tunable filter (AOTF) has attracted great attention in recent years, in part because it appears to be a suitable basis for multi-wavelength optical cross-connects. It is probably the only known tunable filter that is capable of selecting several wavelengths simultaneously. This capability can be used to construct a multi-wavelength router.

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“…The acoustic-optic tunable filter [1] (AOTF) has attracted great attention in recent years, in part because it appears to be a suitable basis for multiwavelength optical cross-connects. It is probably the only known tunable filter capable of selecting several wavelengths simultaneously.…”

Section: Introductionmentioning

confidence: 99%

“…Several techniques for bandwidth widening of microstrip antennas have been reported in literature, such as the use of thick substrates [1] and multiple dielectric resonators [2]. In all these cases the impedance bandwidth is found to be less than 10%.…”

Section: Introductionmentioning

confidence: 99%

Interchannel crosstalk on the acousto‐optic tunable filter (AOTF) for network applications

Sobrinho

Lima

Sombra

2002

Micro & Optical Tech Letters

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In this paper, we present a study of the crosstalk level of an acousto‐optic tunable filter (AOTF) operating with ultrashort light pulses (2 ps). Initially, we consider the performance of the device, with several lengths, operating in the linear and nonlinear regime without loss. Given low pump power (P0 = 1 W), the crosstalk level (XL) of this device always increases with the length of the AOTF, for three different device configurations: the soliton regime, the dispersionless regime, and the linear regime. For shorter devices (L/10 < ξL < L), the soliton regime presents the lower XL. However, this behavior is reversed for longer devices, where the filter bandwidth is much shorter than the pulse bandwidth. For the dispersionless regime and low pump power, the device with length of ξL = L/10 presents the lowest XL. As one starts increasing the pump power, the XL is increases as a consequence of the increase of the switched pulse's bandwidth. One would expect that the presence of nonlinearity leads to the broadening of the pulse bandwidth associated with the self‐phase modulation and, consequently, with the increase of the XL. For high power (P0 = 9 W), the switched pulse is also presenting pulse break up. However, in the limit of high pump powers, all the devices present almost the same XL of around −1.5 dB. For the soliton regime, in all the devices there is a decrease of the XL for pump powers around 1 W, which is the energy of the fundamental soliton. For high pump powers, all devices present a second peak, where again a decrease of the XL is detected. For the ξL = L/10 device, the minimum is around 8 W. The increase of the pump power results in high‐order solitons and pulse compression; in this situation, the bandwidth of the pulse increases and we can extrapolate the bandwidth of the device, the XL as increases. The study of the effect of the XL on the AOTF, operating with ultra‐short optical solitons, provides possibilities for achieving high efficiency in ultrafast all‐optical signal processing, especially for optical switches, filters, and optical transistors. The acoustic‐optic tunable filter (AOTF) has attracted great attention in recent years, in part because it appears to be a suitable basis for multiwavelength optical cross‐connects. It is probably the only known tunable filter that is capable of selecting several wavelengths simultaneously. This capability can be used to construct a multiwavelength router. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 230–235, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10565

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Integrated-optic acoustically tunable infra-red optical filter

Cited by 81 publications

References 1 publication

Numerical analysis of a high-resolution fast tunable filter based on an intracavity Bragg grating

Numerical analysis of a high-resolution fast tunable filter based on an intracavity Bragg grating

Acousto-Optic Tunable Filter (AOTF) Revisited: Ultrashort Optical Pulses Crosstalk Studies on the Lossy Filter

Interchannel crosstalk on the acousto‐optic tunable filter (AOTF) for network applications

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