Photonics Research, Volume. 8, Issue 4, 440(2020)
Brillouin wavelength-selective all-optical polarization conversion
Fig. 1. (a) Concept of the nonlinear polarization controller based on two independently controlled variable elements: a circular retarder and a linear retarder. The SOP of an incoming optical signal at
Fig. 2. Block diagram of a nonlinear all-optical polarization controller made of one circular retarder plus one linear retarder. HNLF, highly nonlinear fiber; OC, optical circulator; ISO, isolator; VOA, variable optical attenuator; PC, polarization controller; FBG, fiber Bragg grating; OSA, optical spectrum analyzer; PA, polarization analyzer.
Fig. 3. Experimental results for a 0.16 mW input signal with linear polarization at 45º (Jones vector
Fig. 4. (a) (Left) Retardance induced as a function of pump power for the circular (blue solid) and linear (red solid) retarders for input signal with linear SOP at 45º (Jones vector
Fig. 5. Retardance versus pump power for a Brillouin circular retarder for signals of 0.63 mW (dotted black), 0.16 mW (dotted red), 0.08 mW (dotted green), and 0.04 mW (dotted blue).
Fig. 6. Variation of the insertion loss of the polarization controller as a function of pump power for signals with different input power at the HNLF.
Fig. 7. Temporal stability of the signal SOP at the output of the polarization controller. (a) Stokes parameters of the signal output with linear SOP at 135° as a function of time:
Fig. 8. Block diagram of a nonlinear all-optical polarization controller used to measure noise. HNLF, highly nonlinear fiber; OC, optical circulator; ISO, isolator; VOA, variable optical attenuator; FBG, fiber Bragg grating; OSA, optical spectrum analyzer; PA, polarization analyzer; ES, electrical spectrum analyzer; VNA, vector network analyzer.
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Diego Samaniego, Borja Vidal. Brillouin wavelength-selective all-optical polarization conversion[J]. Photonics Research, 2020, 8(4): 440
Category: Nonlinear Optics
Received: Jul. 1, 2019
Accepted: Dec. 26, 2019
Published Online: Mar. 5, 2020
The Author Email: Borja Vidal (bvidal@dcom.upv.es)