Temperature and axial strain characteristic of cladding etched single-mode fiber based acousto-optic tunable filter

•The temperature and axial stain characteristic of CE-SMF-AOTF are demonstrated.•The filter has a linear wavelength shift response to temperature or axial strain.•The filter with small fiber diameter has a higher sensitivity.

The temperature and axial strain characteristic of the cladding etched single-mode fiber based acousto-optic tunable filter (CE-SMF-AOTF) were described in the simulation and experiment. In the simulation, the CE-SMF-AOTF had a linear wavelength shift response to the temperature and axial strain, and the filter with small fiber diameter was more sensitive to the temperature and axial strain than it with large fiber diameter. In the experiment, the temperature and axial strain characteristic of the CE-SMF-AOTF with fiber diameters of 39 μm and 67 μm were measured. The experimental results accorded well with the simulated ones.