Reflectivity characteristics of the fiber loop mirror with a polarization controller

Feng, Shijie; Mao, Qinghe; Shang, Liang; Lit, John W. Y.

doi:10.1016/j.optcom.2007.05.016

Cited by 21 publications

(15 citation statements)

References 17 publications

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“…These Sagnac loop mirrors, with a polarization controller placed in each loop, act as variable reflectors. By adjusting the polarization controller (i.e., PC4 or PC5), one can change the reflectivity of the loop mirrors and thereby can switch from single to dual-output port configurations [26,27]. The low power tunable optical filter (TF), which is placed in the common branch I, is used for selecting and tuning the operating wavelength of the proposed fiber laser.…”

Section: Methodsmentioning

confidence: 99%

“…All-single-mode fiber-based Sagnac loop mirrors have been widely used in temperature [18], strain [19], and pressure [20] high sensitivity sensors as well as in wavelength optical switches [21]. Moreover, SLMs with adjustable reflectivity have been used to form Fabry-Perot linear resonators [22][23][24][25] where the amount of the output optical power from the resonators depends on the reflectivity of the SLMs [26,27]. In this work, two SLMs were used to control the amount of optical power delivered from two output ports of the proposed fiber compound-ring laser.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Technique for Designing High Power Semiconductor Optical Amplifier (SOA)-Based Tunable Fiber Compound-Ring Lasers Using Low Power Optical Components

2017

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A simple, stable and inexpensive dual-output port widely tunable semiconductor optical amplifier (SOA)-based fiber compound-ring laser structure is demonstrated. This unique nested ring cavity enables high optical power to split into different branches where amplification and wavelength selection are achieved by using low-power SOAs and a tunable filter. Furthermore, two Sagnac loop mirrors, which are spliced at the two ends of the compound-ring cavity not only serve as variable reflectors but also channel the optical energy back to the same port without using any high optical power combiner. We propose and discuss how the demonstrated fiber compound-ring laser structure can be extended in order to achieve a high power fiber laser source by using low power optical components, such as N × N couplers and (N > 1) number of SOAs. A coherent beam-combining efficiency of over 98% for two parallel nested fiber ring resonators is achieved over the C-band tuning range of 30 nm. Optical signal-to-noise ratio (OSNR) of +45 dB, and optical power fluctuation of less than ±0.02 dB are measured over three hours at room temperature.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Technique for Designing High Power Semiconductor Optical Amplifier (SOA)-Based Tunable Fiber Compound-Ring Lasers Using Low Power Optical Components

2017

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“…The initial lights are coupled into the fiber loop by the 3dB coupler. The fields at port 1 and 2 can be related to the fields at port 3 and 4 using the Jones matrix (represented by M C ), as described in [18] …”

Section: Theoretical and Operating Principlementioning

confidence: 99%

Theoretical Analysis of a Two-stage Sagnac loop filter using Jones Matrices

Ahmad¹,

Dahlan²,

Cholan³

2017

IJECE

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In this work, a theoretical analysis of a Sagnac loop filter (SLF) with twostage polarization maintaining fibers (PMFs) and polarization controllers (PCs) is presented. The transmission function of this two-stage SLF is calculated in detail by using Jones matrix. The calculation is performed in order to investigate the filtering characteristics. The theoretical results show that the wavelength interval is depending on the dynamic settings of the length of the PMFs and the polarization angle of the PCs. By changing the polarization angle of the PCs, a multiple of single, dual or triple wavelength in each channel can be achieved. Based on this study, a flat multiwavelength spectrum can be obtained by adjusting the PMFs and the PCs in the twostage SLF. This finding significantly contributes to the generation of multiwavelength fiber laser (MWFL) that can be used for many optical applications. Keyword:Multiwavelength fiber laser Optical fiber Polarization controller (PC) Polarization maintaining fiber Sagnac loop filter (SLF)

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“…This allows us to dynamically change the reflectivity of the partial mirrors by controlling the FLM reflectivity via a PC element. It has been shown that FLMs can provide a 0% to 100% reflectivity provided a 50/50 optical splitter is used 29 , hence by a simple PC control mechanism we can achieve a wide range of optical reflectivities. In addition, the cavity length (e.g., distance L 1 between the two FLMs in the MGTI arm) can be controlled using an optical delay line ( Fig.…”

Section: The Proposed All Fiber Based Mgti Architecturementioning

confidence: 99%

“…This functional block diagram can be used to calculate the output electric filed. It is easier to treat each polarization separately and then combine them to calculate the overall output electric field and from that the optical intensity [29][30][31] . Following the functional block diagram, the incident electric filed in the vertical polarization) is split by the optical coupler (OC).…”

Section: All Fiber Based Michelson Gires-tournois Interferometer Tranmentioning

confidence: 99%

Adjustable transfer function optical filter for microwave applications

2012

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All-optical techniques for microwave and radio frequency (RF) signal processing has attracted considerable attention in recent years. An important optical component in these all-optical signal processing techniques is the optical filter. Tunable optical filters with a variety of transfer functions have been proposed. However, adjustability of the optical filter transfer function is required to provide an extra degree of control. This adjustability of the shape of the transfer function has not been addressed adequately in the literature. In this paper, we report on the theoretical basis for an allfiber based adjustable transfer function optical filter. In particular, we model the optical filter using FO-circuit transfer matrices and Jones matrices to fully describe the state of polarization changes of the optical signals through the optical filter. The filter is based on an all fiber Michelson Gires-Turnois interferometer (MGTI). The Gires-Turnois resonators (GTRs) required for the formation of the MGTI are realized by pairs of fiber-loop mirrors (FLMs) in the two arms of the Michelson interferometer. The optical reflectivity of the GTRs is control via adjustment of the polarization in the fiber loop mirrors. We show that arbitrary transfer functions can be realized by adjusting the reflectivity of the FLMs as well as the cavity length of the fiber based GTRs.

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Reflectivity characteristics of the fiber loop mirror with a polarization controller

Cited by 21 publications

References 17 publications

A Novel Technique for Designing High Power Semiconductor Optical Amplifier (SOA)-Based Tunable Fiber Compound-Ring Lasers Using Low Power Optical Components

A Novel Technique for Designing High Power Semiconductor Optical Amplifier (SOA)-Based Tunable Fiber Compound-Ring Lasers Using Low Power Optical Components

Theoretical Analysis of a Two-stage Sagnac loop filter using Jones Matrices

Adjustable transfer function optical filter for microwave applications

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