Effects of taper parameters on free spectral range of non‐adiabatic tapered optical fibers for sensing applications

Musa, B.; Kamil, Yasmin Mustapha; Bakar, M. H. Abu; Noor, A. S. M.; Ismail, Amin; Mahdi, Mohd Adzir

doi:10.1002/mop.29674

Cited by 23 publications

(9 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So the tapered fiber can be used as a filter to generate stable multiple wavelengths [40]- [42]. Further study showed that the free spectral range (FSR) can be expressed as [43], [44]:…”

Section: Discussionmentioning

confidence: 99%

Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers

et al. 2020

View full text Add to dashboard Cite

We have experimentally demonstrated tunable multi-wavelength bright-dark and dark-bright pulse pairs in an all normal dispersion Yb-doped fiber laser (YDFL) with a long cavity configuration. By carefully adjusting the pump power and the polarization state, bright-dark pulse pairs could be converted into dark-bright pulse pairs at the same wavelength. The comb filter provided by the tapered fiber facilitated the formation of the multi-wavelength pulses. And the wavelength-tunable for both bright-dark pulse pairs and dark-bright pulse pairs could be achieved by using a tapered fiber and rotatable polarization controller in the cavity to control the cavity losses. The tunable ranges were 14 nm and 4 nm with wavelength spacings of~3.5 nm and~3.7 nm for dual-wavelength pulse pairs and triple-wavelength pulse pairs, respectively.

show abstract

“…So the tapered fiber can be used as a filter to generate stable multiple wavelengths [40]- [42]. Further study showed that the free spectral range (FSR) can be expressed as [43], [44]:…”

Section: Discussionmentioning

confidence: 99%

Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Its real-time control system allows manipulation of dimensions, uniformity, and reproducibility of the fabricated taper as the pulling speed and heat are kept at a constant value of 1 mm/s and 42 W, respectively. Figure 1 illustrates the geometry of the non-adiabatic tapered optical fiber used throughout the experiment, with parameters of waist diameter, waist length, up-taper length and down-taper length set at 10 µm, 12 mm, 5 mm and 5 mm following previously reported work (Musa et al, 2016).…”

Section: Methodsmentioning

confidence: 99%

“…A simpler alternative proposed in recent times is the tapered optical fibers. Tunability in tapered fibers is acquired through its high sensitivity towards environmental changes such as stress, strain, and temperature (Da Silveira et al, 2015;Ali et al, 2014;Musa et al, 2016). The stretching of the fiber down to tens of micrometres makes it more pliable which enables bending at a much larger angle without physical damage.…”

Section: Introductionmentioning

confidence: 99%

Fiber Twist-based Wavelength Tunability in Tapered Optical Fiber Filters

Mansor

Nawi

Abidin

et al. 2020

JST

View full text Add to dashboard Cite

This work demonstrates the tunability of tapered single mode fiber (SMF) and tapered polarization maintaining fiber (PMF) filters based on fiber twisting method. One end of the tapered fiber was twisted from 0o until 100o using the Vytran Fiber Processing System. Observation on the spectral output shows that the fiber twisting technique is a viable option to impart tunability in tapered fibers with total shift of 15 and 10 nm, respectively for SMF and PMF. Better tunability is observed in the SMF filter due to its simple physical structure and more straightforward interferometry effect but a significantly higher extinction ratio is observed for the PMF filter. Both filters exhibited region of linear wavelength shift with corresponding R2 values of 0.9924 and 0.9294 for SMF and PMF. The simplicity and reliability of the filter may pave the way for the development of a practical and compact tunable all-fiber filter for laser systems.

show abstract

“…The proposed sensing system consist of two tapers region that are separated with various distances of 1, 2, and 3 cm. When light is transmitted into the first taper area, the core mode is excited to high-order mode in the cladding area and propagated along the cladding [20]. The guided high-order mode that penetrates into the cladding layer produces a strong evanescent field between the cladding surface and the external environment [21].…”

Section: Dt Pof Principlementioning

confidence: 99%

“…One can see that the tapered structure, both single and double tapered induced the modal interference phenomenon as indicated by the appearance of peaks. The interference spectrum only appear when the tapered structure in non-adiabatic condition [20]. In non-adiabatic conditions, the core mode will be excited to the higher order mode due to the geometry of the tapered structure in down-taper transition [20].…”

Section: Experimental Set-upmentioning

confidence: 99%

Spectral characteristic of symmetric double tapered plastic optical fibers

Marinah¹,

Puspita²,

Banurea³

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Plastic optical fiber (POF) sensor has been immensely developed for many sensing applications including physical and chemical/bio sensor. Since it offers the advantages of non-destructive, easy fabrication and installation, immunity to electromagnetic interference, compact, low fabrication costs and higher durability compare to silica fiber sensor. Tapered POF is one of the modified structures on POF by reducing its diameter and induces guided modes in the core to be evanescent modes. As a sensor, the tapered structure on POF increase the sensitivity of non-tapered POF. The number of tapers on optical fiber affect its characteristics as well. Hence, it is important to investigate the characteristic of tapered POF with the variation on number of tapers. In this paper, the spectral characteristic of symmetric double tapered POF (DT POF) was investigated. The fabrication of symmetric DT POF was conducted by reducing the core diameter using chemical process as described in. The core diameter and the length of the tapered were fixed at 0.45 mm and 1 cm, respectively. The distance between two tapers was varied from 1-3 cm. Transmission spectrum characterization of symmetric DT POF was measured at near infrared wavelength range (900-1600 nm) using a spectrometer by OTO-Photonics.

show abstract

Effects of taper parameters on free spectral range of non‐adiabatic tapered optical fibers for sensing applications

Cited by 23 publications

References 17 publications

Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers

Tunable Multi-Wavelength Bright-Dark and Dark-Bright Pulse Pairs Fiber Lasers

Fiber Twist-based Wavelength Tunability in Tapered Optical Fiber Filters

Spectral characteristic of symmetric double tapered plastic optical fibers

Contact Info

Product

Resources

About