Cost-effective optical coherence tomography spectrometer based on a tilted fiber Bragg grating

Stefan Remund; Anke Bossen; Xianfeng Chen; Ling Wang; Adedotun Adebayo; Lin Zhang; Boris Považay; Christoph Meier

doi:10.1117/12.2039409

20 February 2014 Cost-effective optical coherence tomography spectrometer based on a tilted fiber Bragg grating

Stefan Remund, Anke Bossen, Xianfeng Chen, Ling Wang, Adedotun Adebayo, Lin Zhang, Boris Považay, Christoph Meier

Proceedings Volume 8938, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV; 89381E (2014) https://doi.org/10.1117/12.2039409
Event: SPIE BiOS, 2014, San Francisco, California, United States

Abstract

A compact, fiber-based spectrometer for biomedical application utilizing a tilted fiber Bragg grating (TFBG) as integrated dispersive element is demonstrated. Based on a 45° UV-written PS750 TFBG a refractive spectrometer with 2.06 radiant/μm dispersion and a numerical aperture of 0.1 was set up and tested as integrated detector for an optical coherence tomography (OCT) system. Featuring a 23 mm long active region at the fiber the spectrum is projected via a cylindrical lens for vertical beam collimation and focused by an achromatic doublet onto the detector array. Covering 740 nm to 860 nm the spectrometer was optically connected to a broadband white light interferometer and a wide field scan head and electronically to an acquisition and control computer. Tomograms of ophthalmic and dermal samples obtained by the frequency domain OCT-system were obtained achieving 2.84 μm axial and 7.6 μm lateral resolution.

Citation Download Citation

Stefan Remund, Anke Bossen, Xianfeng Chen, Ling Wang, Adedotun Adebayo, Lin Zhang, Boris Považay, and Christoph Meier "Cost-effective optical coherence tomography spectrometer based on a tilted fiber Bragg grating", Proc. SPIE 8938, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV, 89381E (20 February 2014); https://doi.org/10.1117/12.2039409

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