Time-domain optical coherence tomography at 2 $μ\mathrm{m}$ using GaSb-based broadband superluminescent diode
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917233224056832 |
|---|---|
| author | Bhuiyan, Ifte Khairul Aam Jimenez, Alejandro Martinez Cernat, Ramona Uceda, Adrian Fernandez Hilska, Joonas Peil, Markus Marques, Manuel Jorge Dobre, George Viheriala, Jukka Podoleanu, Adrian Guina, Mircea |
| author_facet | Bhuiyan, Ifte Khairul Aam Jimenez, Alejandro Martinez Cernat, Ramona Uceda, Adrian Fernandez Hilska, Joonas Peil, Markus Marques, Manuel Jorge Dobre, George Viheriala, Jukka Podoleanu, Adrian Guina, Mircea |
| contents | We report a time-domain optical coherence tomography (TD-OCT) system operating in the 2 $μ\mathrm{m}$ spectral region, enabled by a GaSb-based superluminescent diode (SLD). The spectrum emitted by the SLD exhibits a full-width half-maximum (FWHM) of $\sim$80 nm centred near 2.1 $μ\mathrm{m}$. For OCT operation, stable amplified spontaneous emission with low spectral ripple ($<20\%$) is maintained at drive currents below 150 mA. The SLD is fiber coupled and integrated into a fiber-based Michelson interferometer. In the OCT system, the measured coherence envelope yields an axial resolution of approximately 300 $μ$m in air and enables depth-resolved imaging of scattering paint-based coating samples. In contrast to OCT implementations at 2 $μ\mathrm{m}$ wavelength region that commonly rely on supercontinuum sources, the use of GaSb-based SLDs offers a compact practical alternative, leveraging the maturity and scalability of electrically driven semiconductor light sources packaged in a standard "butterfly" module. This report represents the first demonstration of TD-OCT imaging at 2 $μ\mathrm{m}$ using a GaSb-based SLD source and establishes its suitability for compact and scalable mid-IR OCT instrumentation targeting non-biological, low-water-content materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_22261 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Time-domain optical coherence tomography at 2 $μ\mathrm{m}$ using GaSb-based broadband superluminescent diode Bhuiyan, Ifte Khairul Aam Jimenez, Alejandro Martinez Cernat, Ramona Uceda, Adrian Fernandez Hilska, Joonas Peil, Markus Marques, Manuel Jorge Dobre, George Viheriala, Jukka Podoleanu, Adrian Guina, Mircea Optics Applied Physics We report a time-domain optical coherence tomography (TD-OCT) system operating in the 2 $μ\mathrm{m}$ spectral region, enabled by a GaSb-based superluminescent diode (SLD). The spectrum emitted by the SLD exhibits a full-width half-maximum (FWHM) of $\sim$80 nm centred near 2.1 $μ\mathrm{m}$. For OCT operation, stable amplified spontaneous emission with low spectral ripple ($<20\%$) is maintained at drive currents below 150 mA. The SLD is fiber coupled and integrated into a fiber-based Michelson interferometer. In the OCT system, the measured coherence envelope yields an axial resolution of approximately 300 $μ$m in air and enables depth-resolved imaging of scattering paint-based coating samples. In contrast to OCT implementations at 2 $μ\mathrm{m}$ wavelength region that commonly rely on supercontinuum sources, the use of GaSb-based SLDs offers a compact practical alternative, leveraging the maturity and scalability of electrically driven semiconductor light sources packaged in a standard "butterfly" module. This report represents the first demonstration of TD-OCT imaging at 2 $μ\mathrm{m}$ using a GaSb-based SLD source and establishes its suitability for compact and scalable mid-IR OCT instrumentation targeting non-biological, low-water-content materials. |
| title | Time-domain optical coherence tomography at 2 $μ\mathrm{m}$ using GaSb-based broadband superluminescent diode |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2601.22261 |