Design and optimization of index-guiding photonic crystal fiber gas sensor

Enhancement of the sensitivity of gas sensor based on microstructure optical fiber

“…Index guiding (IG) PCFs [12][13][14][15] and photonic band gap (PBG) PCFs [3,10,16] are used to implement gas sensors. A gas sensor based on hollow core PBGPCFs is proposed in [12,[14][15][16][17] to confine more light into the core which contains gas samples.…”

“…A gas sensor based on hollow core PBGPCFs is proposed in [12,[14][15][16][17] to confine more light into the core which contains gas samples. Since in this fiber, fraction of total power is enhanced by the power of hollow core, the sensitivity is significant [12,[14][15][16][17].…”

“…A gas sensor based on hollow core PBGPCFs is proposed in [12,[14][15][16][17] to confine more light into the core which contains gas samples. Since in this fiber, fraction of total power is enhanced by the power of hollow core, the sensitivity is significant [12,[14][15][16][17]. However, it has two fundamental limitations: narrow transmission spectral band and lack of precise control of waveguide parameters for maintaining the band gap effect [14][15][16][17].…”

“…Since in this fiber, fraction of total power is enhanced by the power of hollow core, the sensitivity is significant [12,[14][15][16][17]. However, it has two fundamental limitations: narrow transmission spectral band and lack of precise control of waveguide parameters for maintaining the band gap effect [14][15][16][17]. To overcome these limitations, index guided PCF is considered as a potential candidate.…”

“…To overcome these limitations, index guided PCF is considered as a potential candidate. But the relative sensitivity of this fiber is very low due to poor interaction between light penetrating into the holes in the cladding and the gas samples inside the holes [14,15].…”