Tuneable Sagnac comb filter including two wave retarders

Pottiez, O.; Ibarra-Escamilla, B.; Kuzin, E. A.; Grajales-Coutiño, R.; González-García, Andrés

doi:10.1016/j.optlastec.2009.08.008

Cited by 22 publications

(9 citation statements)

References 34 publications

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“…Optical fibre multiwavelength filters can be usefully applied to optical pulse train generation [1], optical label swapping [2], high-speed wavelength routing [3], and multiwavelength lasing [4,5] owing to their merits such as simple structure, passive operation, and good fibre compatibility. They have been developed by incorporating a Sagnac birefringence interferometer [6][7][8], Mach-Zehnder interferometer [9][10][11], and a polarization-diversified loop structure (PDLS) [12][13][14]. PDLS-based multiwavelength filters can offer more efficient wavelength controllability than other multiwavelength filters.…”

Section: Introductionmentioning

confidence: 99%

Continuously wavelength‐tunable passband‐flattened fibre multiwavelength filter based on heterogeneous combination of wave retarders

Jung

Lee

2022

Micro & Nano Letters

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By incorporating the heterogeneous combination of wave retarders, the authors demonstrated a continuously wavelength-tunable passband-flattened fibre multiwavelength filter comprised of a four-port polarization beam splitter (PBS), two equal-length polarizationmaintaining fibre (PMF) segments, one wave retarder combination (WRC) of dual quarter-wave retarders (QWRs), and another WRC of a half-wave retarder (HWR) and a QWR. The former WRC lies before the first PMF segment, and the latter one is located between the two PMF segments. From the theoretically derived filter transmittance, the authors found the orientation angle (OA) sets of the four wave retarders where the additional phase ϕ of the transmittance function could be continuously modified from 0 • to 360 • . For eight OA sets allowing ϕ to increase from 0 • to 315 • by 45 • , the authors calculated the passband-flattened transmission spectrum of the filter and confirmed its redshift by 0.1 nm per set. Then, this theoretical prediction was verified by the experimental implementation of the filter, which clearly indicates the continuous wavelength tuning capability of the proposed filter.

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Section: Introductionmentioning

confidence: 99%

Continuously wavelength‐tunable passband‐flattened fibre multiwavelength filter based on heterogeneous combination of wave retarders

Jung

Lee

2022

Micro & Nano Letters

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“…The main component to obtaining tunable and multiple wavelengths laser emission is the wavelength selector filter (SWF, Selective wavelength Filter). This filter is implemented in different ways, such as using Fiber Bragg Gratings(FBG) [2,3], Fabry-Perot interferometers (FPI) [4,5], Sagnac interferometers [6,7], and Mach-Zehnder interferometer(MZI) [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Temperature Sensor Using Fiber Ring Laser Based On a Core-Offset Mach-Zehnder Interferometer

Contreras

2021

Supl. Rev. Mex. Fis.

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The development of fiber optic sensors receives special interest since they can be used in multiple applications. As a result, fiber optic laser-sensor schemes had emerged as a reliable device, due to its characteristics such as: high power, low threshold, and high stability. In this work, it is proposed a fiber laser-sensor based on a ring cavity configuration. The cavity is operated by a core-offset Mach-Zehnder interferometer, which is used as a wave selection filter and temperature detection device. Here, the proposed fiber laser-sensor exhibits sensing properties such as sensitivity of 0.03119 pm/°C , dynamic range of 90ºC and a signal to noise ratio of 52 dB

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“…Absolute wavelength tuning of passbands of a comb filter is highly required for extracting or rejecting the desired wavelength component in wavelength-division multiplexed optical systems. There have been plenty of studies to realize continuous wavelength tunability in a comb filter by utilizing a Sagnac birefringence interferometer (SBI) [8], [9], a Mach-Zehnder interferometer (MZI) [10], [11], a Lyot-type birefringence interferometer [12], [13], and a polarization-diversified loop configuration (PDLC) [14]- [18]. Comb filters based on the PDLC [19], [20] offer more efficient and flexible wavelength switchability and tunability compared with other schemes mentioned above [14]- [18].…”

Section: Introductionmentioning

confidence: 99%

Polarization-Independent Wavelength-Tunable First-Order Fiber Comb Filter

Jung

Lee

2019

IEEE Photonics J.

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Here, we propose a polarization-independent wavelength-tunable first-order fiber comb filter based on a polarization-diversified loop configuration. The proposed filter is composed of a polarization beam splitter, two equal-length high birefringence fiber (HBF) segments, three half-wave retarders (HWRs), and two quarter-wave retarders (QWRs). Among these five wave retarders (WRs), a group of an HWR and a QWR is located in front of each HBF. The third remaining HWR is positioned after the second HBF segment and utilized to adjust the effective orientation angle of this HBF. On the basis of the filter transmittance derived through Jones formulation, orientation angle sets of the five WRs, which can induce an arbitrary phase shift from 0 to 2π in the transmittance function, are found at both flat-top and narrow band transmission spectra. From theoretical transmission spectra obtained at eight selected orientation angle sets of the five WRs, which cause phase shifts increasing linearly from 0 to 7π/4 by a step of π/4, it is confirmed that the flat-top or narrow band comb spectrum can be continuously tuned by properly controlling the WR orientation angles. Then, this theoretical prediction is verified by experimental demonstration. In particular, the spectral evolution of the output states of polarization (SOPs) of the third HWR, the last one of optical components contained within the polarization-diversified loop, is investigated on the Poincare sphere. The relationship of the passband shape and wavelength tuning with the spectral evolution of the SOP is also discussed.

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Tuneable Sagnac comb filter including two wave retarders

Cited by 22 publications

References 34 publications

Continuously wavelength‐tunable passband‐flattened fibre multiwavelength filter based on heterogeneous combination of wave retarders

Continuously wavelength‐tunable passband‐flattened fibre multiwavelength filter based on heterogeneous combination of wave retarders

Temperature Sensor Using Fiber Ring Laser Based On a Core-Offset Mach-Zehnder Interferometer

Polarization-Independent Wavelength-Tunable First-Order Fiber Comb Filter

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