Dual resonant peaks of LP015 cladding mode in long-period gratings

Shu, Xuewen; Zhu, Xuemei; Wang, Qinglin; Jiang, Shan; Shi, Wei; Huang, Zehuan; Huang, Dexiu

doi:10.1049/el:19990442

Cited by 52 publications

(16 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, due to the short grating period required, high order mode LPFGs are usually inscribed in H -loaded fibers through a mask by an ultraviolet (UV) laser. Although several techniques, such as post- exposure by the UV laser [5] and etching the cladding [6], have been proposed to adjust the resonance wavelengths of the resulted grating, it is hard for the UV inscription technique to fabricate high order mode TAP-LPFGs directly.…”

Section: Introductionmentioning

confidence: 99%

Turn-Around-Point Long-Period Fiber Gratings Fabricated by CO$_{2}$ Laser Point-by-Point Irradiations

Lan

Han

Wei

et al. 2011

IEEE Photon. Technol. Lett.

View full text Add to dashboard Cite

High order mode long-period fiber gratings (LPFGs) were fabricated for the first time, to our knowledge, by point-bypoint CO laser irradiations. With this method, turn-around-point LPFGs working in various circumstances can be easily fabricated by adjusting the inscription period. Effects of fabrication parameters on the characteristics of the resulted LPFGs have been studied. Tenth-order LPFGs have been fabricated and demonstrated for temperature sensing.Index Terms-CO laser, high order mode long-period fiber gratings (LPFGs), point-by-point irradiation, turn-around-point.

show abstract

Section: Introductionmentioning

confidence: 99%

Turn-Around-Point Long-Period Fiber Gratings Fabricated by CO$_{2}$ Laser Point-by-Point Irradiations

Lan

Han

Wei

et al. 2011

IEEE Photon. Technol. Lett.

View full text Add to dashboard Cite

show abstract

“…However, to obtain maximum benefits from LPG-based sensors in sensing external parameters, an enhanced sensitivity is often desirable. To meet this objective, some authors have employed coupling to higher-order cladding modes that leads to the phenomenon of dual resonance [12]. The dual resonance causes coupling to the same cladding mode at two distinct wavelengths that are found to shift in opposite directions with any change in external measurand.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive Properties of a Long-Period Grating Inscribed in a Dual-Mode Photonic Crystal Fiber

Maity

Varshney

2014

IEEE Sensors J.

View full text Add to dashboard Cite

Sensitivity properties of a long-period grating inscribed in Ge-core, dual-mode photonic crystal fiber (PCF) have been studied numerically. While the fundamental mode of the PCF shows similar characteristics to conventional fibers, its higher order mode exhibits nonmonotonicity in phase matching curve that leads to dual resonance peaks. The dual peaks shift in opposite directions with any changes in strain or temperature and exploiting the separation between the peaks can result in an ultrasensitive device. Our analysis shows that the dual peaks separate by 180 nm when 2-mε strain is applied and 170 nm with a 275°C rise in temperature, which are much higher than the shift in single resonance peaks. Numerical investigations on simultaneous measurement of strain and temperature are also made for the dual resonance case. Furthermore, due to a relatively small cladding radius, the fundamental mode shows a peak shift of 1848 nm per refractive index units when the ambient refractive index changes from 1.325 to 1.35. We infer that our proposed device can be used as a high-performance sensor for single or multiparameter sensing.

show abstract

“…At dual-resonance the same cladding mode is excited at two distinct wavelengths, both of them shifting towards opposite direction with any change in the analyte. This feature is of considerable interest in sensing applications because it nearly doubles the sensitivity of the LPFG based sensor [9,10]. The closer the grating period to the turnaround point (TAP) the larger is the sensitivity [11].…”

Section: Introductionmentioning

confidence: 99%

Long period fiber grating based temperature-compensated high performance sensor for bio-chemical sensing applications

Garg

Tripathi

Thyagarajan

et al. 2013

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Dual resonant peaks of LP015 cladding mode in long-period gratings

Cited by 52 publications

References 7 publications

Turn-Around-Point Long-Period Fiber Gratings Fabricated by CO$_{2}$ Laser Point-by-Point Irradiations

Turn-Around-Point Long-Period Fiber Gratings Fabricated by CO$_{2}$ Laser Point-by-Point Irradiations

Ultrasensitive Properties of a Long-Period Grating Inscribed in a Dual-Mode Photonic Crystal Fiber

Long period fiber grating based temperature-compensated high performance sensor for bio-chemical sensing applications

Contact Info

Product

Resources

About