Post-irradiation resonance wavelength adjustment of long period grating based loss filters
We present a simple technique to precisely and continuously adjust the resonance wavelengths of long-period cladding-mode-coupled gratings without strongly affecting the coupling strength. The main principle of this method is based on the strong dependence of the propagation constants and hence the peak positions of the cladding modes on the cladding diameter. Therefore, one can shift the grating resonance wavelength by changing the cladding dimension. In our case, this has been achieved by etching the fiber in a HF acid solution
1997
9/1
9/5
Inst. of Appl. Opt., Swiss Federal Inst. of Technol., Lausanne, Switzerland
5559557
long period grating based loss filters
post-irradiation resonance wavelength adjustment
cladding-mode-coupled gratings
propagation constants
peak positions
cladding diameter dependence
fiber etching
HF acid solution
step index profile
photoinduced refractive index change
band-rejection filter
transmission spectra
NON-REVIEWED
Event name | Event place | Event date |
London | 7 Feb. 1997 | |