Graphene oxide-polyvinyl alcohol film in micro cavity for optical comb filter generation
by Siti Nur Fatin Zuikafly; Harith Ahmad; Suhaidi Shafie; Hong Ngee Lim; Fauzan Ahmad
International Journal of Nanotechnology (IJNT), Vol. 17, No. 11/12, 2020

Abstract: An optical comb filter which is usually based on low pass characteristics is an excellent component for removing unwanted noise from high frequency spectra in data transmissions and signal processing. A simple interferometric based micro-cavity is proposed to generate an optical comb filter. Graphene oxide (GO)-polyvinyl alcohol (PVA) film was fabricated through a modified Hummer's method from graphite flakes. A micro cavity with a Fabry-Perot interferometer is supplied with an amplified spontaneous emission (ASE) through a single mode optical coupler. The comb filter started to form as the distance was set to over 100 μm owing to the interference effect in the micro cavity as the Fabry-Perot interferometer configuration was used to vary the distance from the fibre tip. The free spectral range, extinction ratio, quality factor, and finesse of the generated comb were recorded from 100 μm up to 400 μm, with the 400 μm distance exhibiting a more stable and efficient comb. The micro cavities parameters were compared with those with no GOPVA and both outputs were recorded. At 400 μm, GO-PVA film generated the most stable optical comb filter of free spectral range, extinction ratio, quality factor, and finesse of 1.94 nm, 11.74 dB, 997.54, and 1.24, respectively. With the advantage of the hydrophilic nature of GO, the device can be implemented in humidity sensor applications.

Online publication date: Wed, 13-Jan-2021

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Nanotechnology (IJNT):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?


Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com