Asymmetric corrugated Long Period Fiber Grating Fabrication and their Optical Characterization
Date Issued
2007
Date
2007
Author(s)
Chen, Chen-You
DOI
en-US
Abstract
The prior proposed corrugated fiber gratings overcome the limitation of conventional fabrication methods which is most cases require photosensitive fiber for making conventional long period fiber gratings. Besides, the corrugated structures enable the flexibility of tuning coupling strength and resonant conditions. However, making a corrugated structure on a fiber by thermal coating is not convenient and inefficient. Hence, a new lithography method was proposed in July 2006. To this thesis contains the previously proposed lithography method, but take advantage of V-grooves which are commonly used in the industry. We set a fiber in a V-groove and coat it with negative photoresist SU8 to protect the bottom of fiber. Then we make a periodic structure on the top of fiber. To finalize the fabrication of a asymmetric corrugated fiber grating. Besides, we use 3-layer etching method to improve the strength gratings and yield of fabrication of fiber.
In addition to proving the tunable optical properties, The asymmetric corrugated fiber grating is found capable of coupling two wavelengths from core mode to cladding modes of two orthogonal polarization states when a mechanical force is applied. We use a polarization analyzer and an optical spectrum analyzer to characterize this phenomenon.
Asymmetric corrugated fiber gratings made by employing the lithographic method exhibits unique optical characteristics. According to our analysis, it is believed that such fiber gratings may find may applications in optical fiber communication and fiber sensing.
Subjects
長週期光纖光柵
非對稱鋸齒狀光纖光柵
SU8
Long period fiber grating
asymmetric corrugated fiber grating
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-J93921033-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):e6e670a3bca2214aac8e240a61d56a09