Optical Designs with Curved Detectors for Fiber Bragg Grating Interrogation Monitors

In this paper, we evaluate the application of curved detectors and freeform optics technologies for fiber Bragg gratings (FBGs) interrogation monitors design. It is shown that, in a high-dispersion spectrograph scheme, the camera part operates in special conditions, which result in a field curvature change. This field curvature can be compensated by the use of a curved detector. When used together with freeform optics, the curved detectors allow for reduction of the number of optical components to two or even one element by merging their functions. Three design examples for the range of 810–860 nm reaching the spectral resolution limit of 89–139 pm at NA=0.14 are presented to demonstrate the achieved performance and the technological trade-offs.

[1]  P. Peumans,et al.  The optical advantages of curved focal plane arrays. , 2008, Optics express.

[2]  P. Peumans,et al.  Curving monolithic silicon for nonplanar focal plane array applications , 2008 .

[3]  Jannick P. Rolland,et al.  Freeform Optical Surfaces: A Revolution in Imaging Optical Design , 2012 .

[4]  Bernard Delabre,et al.  First results from a novel curving process for large area scientific imagers , 2012, Other Conferences.

[5]  Marcelo Martins Werneck,et al.  A Guide to Fiber Bragg Grating Sensors , 2013 .

[6]  Howard A. Padmore,et al.  Variable line spacing diffraction grating fabricated by direct write lithography for synchrotron beamline applications , 2014, Optics & Photonics - Optical Engineering + Applications.

[7]  Aaldert H. van Amerongen,et al.  Performance of silicon immersed gratings: measurement, analysis, and modeling , 2015, SPIE Optical Systems Design.

[8]  Vladimir A. Burdin,et al.  Experimental researches of fiber Bragg gratings operating in a few-mode regime , 2016, Optical Technologies for Telecommunications.

[9]  Catherine Grèzes-Besset,et al.  State of the art in silicon immersed gratings for space , 2017, International Conference on Space Optics.

[10]  Wilfried Jahn.  Innovative focal plane design for high resolution imaging and earth observation : freeform optics and curved sensors , 2017 .

[11]  German A. Alvarez-Botero,et al.  Optical sensing using fiber bragg gratings: fundamentals and applications , 2017, IEEE Instrumentation & Measurement Magazine.

[12]  P. Toet,et al.  Multi-parameter fibre Bragg grating sensor-array for thermal vacuum cycling test , 2017, International Conference on Space Optics.

[13]  Emmanuel Hugot,et al.  Freeform optics complexity estimation: comparison of methods , 2018, Photonics Europe.

[14]  Christophe Gaschet,et al.  Curved CMOS sensor: characterization of the first fully functional prototype , 2018, Photonics Europe.

[15]  Oleg G. Morozov,et al.  Microwave photonic polyharmonic probing for fiber optical telecommunication structures and measuring systems sensors monitoring , 2018, Optical Technologies for Telecommunications.

[16]  Emmanuel Hugot,et al.  Next-generation telescopes with curved focal surface for ultralow surface brightness surveys , 2019, Monthly Notices of the Royal Astronomical Society.

[17]  Christophe Gaschet,et al.  Curved detectors for astronomical applications: characterization results on different samples. , 2019, Applied optics.