Detailed numerical investigation of the interaction of longitudinal acoustic waves with fiber Bragg gratings in suspended-core fibers

Silva, Ricardo E.; Hartung, Alexander; Rothhardt, Manfred; Pohl, Alexandre de Almeida Prado; Bartelt, Hartmut

doi:10.1016/j.optcom.2015.01.037

Cited by 10 publications

(12 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An arbitrary grating with modulation amplitude of the refractive index of ∆nac = 1x10 -3 is considered (parameters detailed in Ref. 9 ). The resulting reflectivities ηSMF = 6.72 x 10 -6 % (SMF) and ηSCF = 1.67 % (SCF) indicate a SCF modulation efficiency of ~25x10 4 higher compared to the SMF.…”

Section: Resultsmentioning

confidence: 99%

“…However, they usually make the device mechanically fragile, additionally exposing the optical properties to be affected by surface contamination. Instead, suspended-core fibres (SCFs) are an emerging option to strengthen the acousto-optic interaction in silica fibres without reducing the fibre diameter [9][10][11] . The large air holes in the SCF reduce the silica content in the fibre cross section increasing the overlapping between the acoustic and optical power in the core ( Fig.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High frequency in-core acousto-optic modulation of a suspended core optical fibre

Silva¹,

Webb²

2020

Micro-Structured and Specialty Optical Fibres VI

View full text Add to dashboard Cite

The confinement of high frequency acoustic waves inside a suspended core fibre (SCF) is numerically investigated for the first time. A 500 µm long acoustic cavity, based on a four-hole SCF, is designed, simulated and evaluated by using the finite element method. The cavity is acoustically excited in the frequency range of 50-56 MHz and the induced displacements are integrated along the fibre. A standard single mode fibre is simulated under the same conditions for comparison. The results show strong Lamb acoustic modes oscillating in the silica bridges and overlapping in the SCF core at the resonance of 52.84 MHz. The induced displacement achieves a maximum in the core centre decaying to an almost null value in the cladding. The acoustic wave concentration in the SCF core is 13 times higher compared to the standard fibre, indicating a promising solution to overcome the frequency limitation of the current all-fibre acousto-optic devices. The modulation efficiency is increased without reducing the fibre diameter, making the devices more stable, fast and suitable to modulate all-fibre lasers.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High frequency in-core acousto-optic modulation of a suspended core optical fibre

Silva¹,

Webb²

2020

Micro-Structured and Specialty Optical Fibres VI

View full text Add to dashboard Cite

show abstract

“…Consequently, the device lengths are usually about 10 cm or longer. In this sense, suspended-core fibres (SCFs) are a promising option to enhance the overlapping between acoustic waves and FBGs in the fibre core 23,24 . The SCFs are generally composed of a very small core surrounded by large air holes which reduce the silica content over the fibre cross section As.…”

Section: Introductionmentioning

confidence: 99%

“…The SCFs are generally composed of a very small core surrounded by large air holes which reduce the silica content over the fibre cross section As. High acousto-optic efficiencies are therefore achieved employing shorter fibre/grating lengths without reducing the fibre diameter [23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

Ultra-compact acousto-optic modulator of a fibre Bragg grating in a highly birefringent suspended core fibre

Silva

Manuylovich

Sahoo

et al. 2021

Micro-Structured and Specialty Optical Fibres VII

Self Cite

View full text Add to dashboard Cite

Highly efficient and compact acousto-optic modulator of a fibre Bragg grating is reported for the first time. The device is composed of millimetre scaled components and a 1 cm grating inscribed in a four air holes birefringent suspended core fibre. The reflection of the orthogonal polarization modes is tuned by a sinusoidal electrical signal at the resonance frequency of 469 kHz. A significant modulation depth of 45% is achieved at a maximum drive voltage of 10 V. The demonstrated 4 cm long all-fibre modulator is 60% shorter compared to previous similar setups, indicating new possibilities for stable and fast switching of fibre-integrated photonic devices.

show abstract

“…One promising option to increase this acousto-optic interaction is the use of suspended-core fibers (SCFs) [7], which are generally composed of a very small core surrounded by a ring of large air holes. It reduces significantly the silica in the cladding, increasing the acousto-optic interaction in the core [8].…”

Section: Introductionmentioning

confidence: 99%

Multi-wavelength reflection spectra from an acousto-optic modulated fiber Bragg grating in a highly birefringent suspended core fiber

et al. 2017

Self Cite

View full text Add to dashboard Cite

The interaction of a fiber Bragg grating and longitudinal acoustic waves in a highly birefringent suspended-core fiber is investigated for the realization of a multi-wavelength reflection property. The modulated grating couples power from the fast and slow polarization modes to shifted superposed modes supported by the grating. The grating reflectivity of the superposed modes are tuned by the voltage of an electrical signal. Up to five different wavelength reflection peaks have been generated indicating new possibilities for compact and fast fiber-integrated multi-wavelength dynamic filters.

show abstract

Detailed numerical investigation of the interaction of longitudinal acoustic waves with fiber Bragg gratings in suspended-core fibers

Cited by 10 publications

References 19 publications

High frequency in-core acousto-optic modulation of a suspended core optical fibre

High frequency in-core acousto-optic modulation of a suspended core optical fibre

Ultra-compact acousto-optic modulator of a fibre Bragg grating in a highly birefringent suspended core fibre

Multi-wavelength reflection spectra from an acousto-optic modulated fiber Bragg grating in a highly birefringent suspended core fiber

Contact Info

Product

Resources

About