A new and simple concept of tunable two-chip microcavities for filter applications in WDM systems

Aziz, Michael J.; Pfeifer, J.; Wohlfarth, M.; Luber, C.; Wu, Shaomin; Meißner, P.

doi:10.1109/68.887731

Cited by 39 publications

(18 citation statements)

References 12 publications

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“…In this section we focus on the influence of a membrane and phase front curvature mismatch due to a wrong beam waist or misalignment of the cavity. We expect a wavelength spacing between two neighboured sidemodes of approximately 0.4 nm (see (5)). …”

Section: Studies On Mismatched Mirror and Phase Front Curvaturesmentioning

confidence: 98%

<title>Micromachined two-chip WDM filters with stable half symmetric cavity</title>

et al. 2001

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Wavelength Division Multiplexing has become a leading technology for long haul transmission systems which operate at 1550 nm wavelength. One of the key components of such systems are tunable filters. Beside low insertion loss, polarization insensitivity and large tuning range there is a strong demand for cost effectiveness and reliability. Twochip micromachined filters are very promising candidates to fulfil these demands. Two Bragg mirrors are deposited on distinct chips. One of them is engineered as actuable membrane. The Fabry-Pérot cavity is created by proper adjustment of the two chips one against the other. Modifying the cavity length by thermal induced heating of the membrane mirror or by applying an electrostatic force provides tunability of the transmission function. Tuning stability and insertion loss can be considerably improved if a stable half symmetric cavity containing a bend membrane instead of a flat one is used. This also helps to overcome some severe fabrication problems. On the other hand the half symmetric cavity is more sensitive to mismatch between filter geometry and phase fronts of the exciting Gaussian beam. This aspect and the tolerances which can be accepted are discussed in this paper in detail.

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Section: Studies On Mismatched Mirror and Phase Front Curvaturesmentioning

confidence: 98%

<title>Micromachined two-chip WDM filters with stable half symmetric cavity</title>

et al. 2001

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“…Although several approaches to the implementation of Fabry-Perot tunable filter have been tried, most of them have several disadvantages such as wide bandwidth and narrow tuning range [1][2][3][4]. In this paper, we have tried to extend the tuning range of the thermo-optic filter by taking advantage of buckling effect of thin membrane in comparison with the conventional filters with flat plane.…”

Section: Introductionmentioning

confidence: 99%

Wavelength tunable thermo-optic filter using buckling effect of etalon composed poly-Si/SiO2 multi-layers

Park

Hwang

et al. 2005

Optical Materials

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“…Bragg reflection type tunable filters have the advantage over the other type of devices such as Fabry-Perot interferometers [2] and ring resonators [3] in terms of the tuning range and the spectral bandwidth. Moreover, Bragg reflectors have no constraint of free spectral range, which is crucial for the other tunable filters.…”

Section: Introductionmentioning

confidence: 99%

Widely tunable polymeric Bragg wavelength filters operated by mechanical strain

Kim¹,

Kim²,

Oh³

2008

SPIE Proceedings

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A tunable wavelength filters with Bragg grating are fabricated on a flexible substrate by using a post lift-off process along with an absorbing layer in order to provide highly uniformity of Bragg grating patterns. When the Bragg grating is fabricated on a flexible substrate, the highly elastic property of polymer is favorable to obtain much wider tuning range than the silica fiber. The flexible Bragg reflector shows narrow bandwidth, which is convincing the uniform grating structure fabricated on plastic film. By stretching the flexible polymer device, the Bragg reflection wavelength is tuned continuously up to 45 nm for the maximum strain of 31,690 µε which is determined by the elastic expansion limit of waveguide polymer. From the linear wavelength shift proportional to the strain, the photoelastic coefficient of the ZPU polymer is found.

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A new and simple concept of tunable two-chip microcavities for filter applications in WDM systems

Cited by 39 publications

References 12 publications

<title>Micromachined two-chip WDM filters with stable half symmetric cavity</title>

<title>Micromachined two-chip WDM filters with stable half symmetric cavity</title>

Wavelength tunable thermo-optic filter using buckling effect of etalon composed poly-Si/SiO2 multi-layers

Widely tunable polymeric Bragg wavelength filters operated by mechanical strain

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