Abstract

The cladding air channels of an endlessly single-mode photonic crystal fiber (PCF) and the high-index sensitivity of its long-period gratings (LPG) inscribed by CO2 laser have been exploited to deposit poly(vinyl pyrrolidone) (PVPON)/poly(methacrylic acid) (PMAA) polyelectrolyte thin films via layer-by-layer assembly (LbL) and to measure the deposition process. We show that LbL can be controllably carried out within the axially aligned air channels. PCF-LPG is highly sensitive to the LbL process as reflected by 1.625nm shift in the resonance wavelength per polyelectrolyte layer incorporated. PCF-LPG is also very robust for in situ monitoring of the release of PVPON from cross-linked polyelectrolytes, which results in the formation of pH-responsive PMAA hydrogel. PCF-LPG containing the hydrogel exhibits well-behaved response to changes in solution pH over 2 to 7.5. We demonstrate that PCF-LPG is 2 orders of magnitude more sensitive than its traditional all-solid counterpart through parallel investigation.

© 2012 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Long-period grating and its cascaded counterpart in photonic crystal fiber for gas phase measurement

Fei Tian, Jiri Kanka, and Henry Du
Opt. Express 20(19) 20951-20961 (2012)

Long period grating cascaded to photonic crystal fiber modal interferometer for simultaneous measurement of temperature and refractive index

Dora Juan Juan Hu, Jun Long Lim, Meng Jiang, Yixin Wang, Feng Luan, Perry Ping Shum, Huifeng Wei, and Weijun Tong
Opt. Lett. 37(12) 2283-2285 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription