1
|
Wu J, Ma X, Liu J, Lai C, Li Y. Unified Stokes-Mueller polarimetry for multi-photon processes at varying wavelengths. OPTICS LETTERS 2024; 49:3464-3467. [PMID: 38875646 DOI: 10.1364/ol.528966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Accepted: 05/19/2024] [Indexed: 06/16/2024]
Abstract
Existing polarimetry, mainly focusing on harmonic generations, overlooks the differences in retardance (DRs) caused by illuminations with different wavelengths in nonlinear processes, consequently falling short in accuracy beyond frequency doubling. In this Letter, with DRs considered, we propose a universal nonlinear Stokes-Mueller (NSM) polarimetry design involving illuminations with different wavelengths. Then, we optimize the NSM measurement model, applied to sum-frequency generation (SFG) and difference frequency generation. To demonstrate the necessity of consideration of DRs, the processes of polarization measurement for SFG are simulated, where the condition number decreases by 51.2%, and the root mean square error of the nonlinear Mueller matrix decreases by 20.48%.
Collapse
|
2
|
Zhao Z, Li Y, Liu K, Zhou G. Derivation and calibration of spectral response for a channeled spectropolarimeter. OPTICS EXPRESS 2023; 31:25763-25780. [PMID: 37710454 DOI: 10.1364/oe.492952] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 07/07/2023] [Indexed: 09/16/2023]
Abstract
The channeled spectropolarimeter (CSP) measures the spectrally-resolved Stokes vector from a snapshot by employing spectral modulation. The spectral modulation transfer function (SMTF) of the spectrometer preferentially suppresses the high-frequency channel amplitude in CSP, resulting in reduced measurement accuracy. This paper rigorously derives the SMTF theory and proposes an efficient calibration method for SMTF via channel shifting in a CSP. The SMTF value, obtained by channel shifting, is used to correct the high-frequency channel amplitude. Moreover, alignment and phase errors, as well as nonlinear dispersion, are compensated in situ. Other than rotating the retarder twice, no additional instruments or algorithms are required in the proposed method. In simulations and experiments, the proposed method shows high accuracy, with a maximum root-mean-square error (RMSE) of the reconstructed Stokes spectrum below 0.01, demonstrating its potential for enhancing the simplicity and practicability of Stokes CSP.
Collapse
|
3
|
Dubreuil M, Tissier F, Le Roy L, Pennec JP, Rivet S, Giroux-Metges MA, Le Grand Y. Polarization-resolved second harmonic microscopy of skeletal muscle in sepsis. BIOMEDICAL OPTICS EXPRESS 2018; 9:6350-6358. [PMID: 31065433 PMCID: PMC6490978 DOI: 10.1364/boe.9.006350] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/07/2018] [Accepted: 11/11/2018] [Indexed: 05/03/2023]
Abstract
Polarization-resolved second harmonic generation (P-SHG) microscopy is able to probe the sub-micrometer structural organization of myosin filaments within skeletal muscle. In this study, P-SHG microscopy was used to analyze the structural consequences of sepsis, which is the main cause of the critical illness polyneuromyopathy (CIPNM). Experiments conducted on two populations of rats demonstrated a significant difference of the anisotropy parameter between healthy and septic groups, indicating that P-SHG microscopy is promising for the diagnosis of CIPNM. The difference, which can be attributed to a change of myosin conformation at the sub-sarcomere scale, cannot be evidenced by classical SHG imaging.
Collapse
Affiliation(s)
- Matthieu Dubreuil
- Université de Bretagne Occidentale, Laboratoire d’optique et de magnétisme OPTIMAG EA 938, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Florine Tissier
- Université de Bretagne Occidentale, Laboratoire optimisation des régulations physiologiques ORPHY EA 4324, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Lucas Le Roy
- Université de Bretagne Occidentale, Laboratoire optimisation des régulations physiologiques ORPHY EA 4324, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Jean-Pierre Pennec
- Université de Bretagne Occidentale, Laboratoire optimisation des régulations physiologiques ORPHY EA 4324, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Sylvain Rivet
- Université de Bretagne Occidentale, Laboratoire d’optique et de magnétisme OPTIMAG EA 938, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Marie-Agnès Giroux-Metges
- Université de Bretagne Occidentale, Laboratoire optimisation des régulations physiologiques ORPHY EA 4324, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Yann Le Grand
- Université de Bretagne Occidentale, Laboratoire d’optique et de magnétisme OPTIMAG EA 938, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| |
Collapse
|