Impedance self-matching ultra-narrow linewidth fiber resonator by use of a tunable π-phase-shifted FBG

Jing, Mingyong; Yu, Bo; Hu, Jingbo; Hou, H.Q.; Xiao, Liantuan; Jia, Suotang

doi:10.1038/s41598-017-02112-5

Cited by 13 publications

(12 citation statements)

References 32 publications

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“…Sub-MHz resonances are highly sought-after for a wide range of applications such as slowlight [1,2] and information storage [3][4][5], high precision sensing [6], microwave photonics [7][8][9], spectroscopy [10], frequency stabilization [11], light detection and ranging (LIDAR) [12,13], and optical gyroscopes [14][15][16]. Demands in these applications have stimulated phenomenal progress in obtaining narrow resonances through platforms like gas-phase atomic systems [17,18], photonic crystal cavities [11,[19][20][21], whispering gallery mode (WGM) [22,23], and microring resonators [24][25][26], slow-light fiber Bragg gratings (FBGs) [2], and phase-shifted FBGs [27].…”

Section: Introductionmentioning

confidence: 99%

Resonator-free tunable sub-MHz spectral dip in the Brillouin gain using spun birefringent fibers

Choksi¹,

Liu²,

Ghasemi³

et al. 2021

Preprint

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Ultra-narrow spectral features are desirable for a broad range of applications, and they are conventionally realized using ultrahigh Q resonant structures. These structures typically require precision fabrication processes, and moreover, since they are passive, they suffer from signal loss. Here, we demonstrate a novel way to achieve sub-MHz tunable spectral dip in the Brillouin gain spectrum of a spun birefringent fiber (SBF) without loss, and without using a resonator. We show that this dip is unique to SBF, where its polarization eigenmodes are elliptical and frequency-dependent, and the dip only occurs when these orthogonal polarization eigenmodes of the SBF (at the respective pump and signal frequencies) are launched in counter-propagating directions. We experimentally demonstrate a 0.72 MHz spectral dip in the Brillouin gain spectrum of a commercial SBF which is to our knowledge, the narrowest SBS spectral feature ever reported. Furthermore, the linewidth, depth, and spectral location of this dip are tunable on demand by controlling the pump frequency, pump power, and the input polarization of the signal. Its simplicity in implementation, its ultra-narrow linewidth, and its tunability can have a wide range of potential applications, from slow-light to microwave photonics.

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Section: Introductionmentioning

confidence: 99%

Resonator-free tunable sub-MHz spectral dip in the Brillouin gain using spun birefringent fibers

Choksi¹,

Liu²,

Ghasemi³

et al. 2021

Preprint

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“…For example, an ultra-narrow-band fiber Bragg grating (FBG) with a 3-MHz linewidth [6], an on-chip optical isolator with a bandwidth of 0.61 MHz [4], and a high-Q optical micro-resonator with a Q value of 1.7 × 10 10 (11.4-kHz or 91.2-attometer bandwidth in the 1550-nm band) [7] were proposed to improve the sensitivity of optical sensing system, which, obviously, needs an ultra-high resolution optical measurement method to implement the sensing demodulation. Similarly, ultra-narrow bandwidth phenomenon, such as spectral hole burning with a 172-kHz notch in Pr:YSO [8], PTsymmetry breaking with MHz-bandwidth resonance in whispering-gallery-mode microcavities [1], and ringing phenomenon in chaotic microcavity [5], has the capability of finely spectral manipulation, which also demands a measurement approach with attometer-level resolution.…”

Section: Introductionmentioning

confidence: 99%

Optical vector analysis with attometer resolution, 90-dB dynamic range and THz bandwidth

Qing

Tang

et al. 2019

Nat Commun

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Optical vector analysis (OVA) capable of achieving magnitude and phase responses is essential for the fabrication and application of emerging optical devices. Conventional OVA often has to make compromises among resolution, dynamic range, and bandwidth. Here we show an original method to meet the measurement requirements for ultra-wide bandwidth, ultra-high resolution, and ultra-large dynamic range simultaneously, based on an asymmetric optical probe signal generator (ASG) and receiver (ASR). The ASG and ASR remove the measurement errors introduced by the modulation nonlinearity and enable an ultra-large dynamic range. Thanks to the wavelength-independence of the ASG and ASR, the measurement range can increase by 2 N times by applying an N-tone optical frequency comb without complicated operation. In an experiment, OVA with a resolution of 334 Hz (2.67 attometer in the 1550-nm band), a dynamic range of > 90 dB and a measurement range of 1.075 THz is demonstrated.

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“…In advanced applications such as optical sensing of nanoparticles [4]- [6], optical storage [7], on-chip optical signal processing [8], non-Hermiton parity-time-symmetric quantum mechanics [9], and on-chip optical nonlinear effects [10], the emerging optical components have pushed the requirements for frequency response measurement techniques to an unprecedented level in terms of measurement bandwidth, dynamic range, and especially resolution. For example, an ultra-fine fiber Bragg grating (FBG) with a 3-MHz linewidth [11], optical micro-resonators with ultrahigh quality factor of more than 1000 were successively proposed to improve the sensitivity of the optical sensing system [12] or realize a recording low threshold and narrow linewidth lasing [13]. In this context, the accurate measurement of frequency response of optical devices with ultra-high resolution is a big challenge.…”

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confidence: 99%

Accurate Calibration and Measurement of Optoelectronic Devices

Zhang

Chen

et al. 2021

J. Lightwave Technol.

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Frequency responses of optoelectronic devices are essential to obtain the precise performance of electrical-to-optical-to-electrical signal conversion or optical signal processing. We reviewed the development of optical or electrical measurement methods proposed for characterizing electrical/optical (E/O) devices, optical/electrical (O/E) devices and optical/optical (O/O) devices in the frequency domain from the perspective of accurate calibration standard. It has been found that full calibrated E/O or O/E measurement requires at least an optoelectronic thru standard for the conversion between optical and electrical domains, and an electrical port extension for de-embedding the error or adapter network of microwave source or detector. The indetermination problem still exists in most O/E and E/O device characterization, which appears in different forms for different measurement techniques. Nevertheless, it should be noticed that obtaining an optoelectronic thru standard can be transferred to characterizing a microwave source or detector in the electrical domain, and a precise electrical calibration standard is much easier to be obtained as compared with an optoelectronic calibration standard. Therefore, the calibration standard transfer from optical to electrical domain is a prominent approach to solve the indetermination problem.

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Impedance self-matching ultra-narrow linewidth fiber resonator by use of a tunable π-phase-shifted FBG

Cited by 13 publications

References 32 publications

Resonator-free tunable sub-MHz spectral dip in the Brillouin gain using spun birefringent fibers

Resonator-free tunable sub-MHz spectral dip in the Brillouin gain using spun birefringent fibers

Optical vector analysis with attometer resolution, 90-dB dynamic range and THz bandwidth

Accurate Calibration and Measurement of Optoelectronic Devices

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