WO2023158635 - WIDELY TUNABLE FREQUENCY DOUBLED LIGHT SOURCE
National phase entry is expected:
Publication Number
WO/2023/158635
Publication Date
24.08.2023
International Application No.
PCT/US2023/013034
International Filing Date
14.02.2023
Title **
[English]
WIDELY TUNABLE FREQUENCY DOUBLED LIGHT SOURCE
[French]
SOURCE DE LUMIÈRE DOUBLÉE EN FRÉQUENCE LARGEMENT ACCORDABLE
Applicants **
JAYARAMAN, Vijaysekhar
BURGNER, Christopher
Inventors
JAYARAMAN, Vijaysekhar
BURGNER, Christopher
Priority Data
63/310,861
16.02.2022
US
Application details
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2458 | |
| EPO | Filing, Examination, Granting | 12139 | |
| Japan | Filing, Examination, Granting | 2478 | |
| South Korea | Filing, Examination, Granting | 2757 | |
| USA | Filing, Examination, Granting | 4710 |
Total:
24,542
The term for entry into the National Phase has expired. This quotation is for informational purposes only
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Abstract[English]
A widely tunable frequency doubled light source includes a fundamental widely tunable laser emitting fundamental radiation tuned over a fundamental wavelength range and a broadband nonlinear waveguide which frequency doubles the fundamental radiation over a frequency doubled wavelength range. Preferred implementations of the nonlinear waveguide include periodically poled lithium niobate with various means for broadening a conversion bandwidth, including dispersion engineering to reduce a group velocity mismatch between fundamental and frequency doubled wavelengths and employing a chirped poling period. Various optical systems are enabled by this new frequency doubled light source, including swept source optical coherence tomography (SSOCT) at previously inaccessible wavelength ranges, such as in the green/yellow gap range from about SOOnm to about 600nm.[French]
Une source de lumière doublée en fréquence largement accordable comprend un laser fondamental largement accordable émettant un rayonnement fondamental accordé sur une plage de longueurs d'onde fondamentale et un guide d'ondes non linéaire à large bande dont la fréquence double le rayonnement fondamental sur une plage de longueurs d'onde doublée en fréquence. Des modes de réalisation préférés du guide d'ondes non linéaire comprennent le niobate de lithium polarisé périodiquement avec divers moyens pour élargir une bande passante de conversion, y compris l'ingénierie de dispersion pour réduire une désadaptation de vitesse de groupe entre des longueurs d'onde fondamentales et doublées en fréquence et l'utilisation d'une période de polarisation comprimée. Divers systèmes optiques sont activés par cette nouvelle source de lumière doublée en fréquence, y compris la tomographie par cohérence optique à source balayée (SSOCT) à des plages de longueurs d'onde précédemment inaccessibles, telles que dans la plage vide vert/jaune d'environ 500 nm à environ 600 nm.