Optical Phase Alteration in Nonlinear Fiber Bragg Grating

2019 ◽  
Vol 7 (2) ◽  
pp. 1001-1004
Author(s):  
Poornima Rawat ◽  
Santosh Pawar ◽  
Tryambak Hiwarkar
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Optical Phase ◽  
Nonlinear Fiber

STEPWISE OPTICAL PHASE SHIFT IN NONLINEAR FIBER BRAGG GRATING

2013 ◽  
Vol 22 (03) ◽  
pp. 1350036 ◽  
Author(s):  
SHUBHADA KUMBHAJ ◽  
SANTOSH PAWAR ◽  
PRATIMA SEN ◽  
PRANAY KUMAR SEN
Keyword(s):  
Phase Shift ◽  
Fiber Bragg Grating ◽  
Kerr Effect ◽  
Simple Expression ◽  
Bragg Grating ◽  
Incident Intensity ◽  
Optical Phase ◽  
Coupled Equations ◽  
Coupled Mode ◽  
Nonlinear Phase

In this paper, the optical phase shift introduced by the fiber Bragg grating is investigated analytically using coupled mode theory. A simple expression for intensity dependent transmittivity as well as optical phase shift has been obtained by incorporating the Kerr effect in nonlinear coupled equations. The behavior is studied as a function of the incident intensity at various detuning wavelengths. It has been found that the nonlinear phase shift increases stepwise with increasing input intensity and such phase modulation of the beam distorts the transmittivity of the grating.

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