301-nm wavelength tunable differentially driven all-polymer optical filter

Abstract

An optical filter based on all-polymer grating-assisted directional coupler is demonstrated. The wavelength tuning is differentially driven. The heater-electrodes created on the sidewalls of the polymer ridge can either blue- or red-shift the central wavelength. A total tuning range of 301 nm is achieved experimentally. The maximal local temperature gradient introduced across the coupler region is only 55°C-68°C. The filter is also insensitive to uniform ambient temperature change. Central wavelength jitter of ±3 nm is observed when the chip holder temperature cycles between 20°C and 80°C.

Switchable dual-polarization external cavity tunable laser

“…The experimental results are in good agreement with the design. The switching speed is limited to a few tens of milliseconds, similar to the polymerbased thermo-optic components published previously [6][7][8][9][10][11][13][14][15][16].…”

“…The heater electrode is buried ∼2.5 μm below the waveguide, and deep air trenches are added to confine the thermal power [14]. This layout, though not the most efficient in generating a temperature gradient to drive the TOS [15,16], proves to be beneficial for the long-term operation of the tunable Bragg grating against heater electrical breakdowns [6,14]. The Y -branch angle is increased to 1.2°and the TOS length is limited to ∼400 μm.…”

Quasi-vertical tapers for polymer-waveguide-based interboard optical interconnects

“…Low-cost and high-efficiency packaging of these devices is crucial in order to enable an economically viable market. The most prominent methods to couple light into a single-mode polymer waveguide include edge coupling using lensed fiber [1,2,22,33] and surface coupling using grating couplers [34][35][36][37][38][39]. Although lensed fibers provide acceptable coupling efficiencies, they are more expensive than standard single-mode fibers (SMFs) and are difficult to package due to their limited misalignment tolerance [23,40].…”

“…Although lensed fibers provide acceptable coupling efficiencies, they are more expensive than standard single-mode fibers (SMFs) and are difficult to package due to their limited misalignment tolerance [23,40]. Conventional polymer grating couplers provide limited coupling efficiency in a narrow bandwidth, due to the small refractive index contrast between the polymer materials [38,39]. Some schemes utilize a thin high index coating in order to achieve the required phase matching condition [35][36][37] and to improve coupling efficiency; still the bandwidth is not large enough to cover both C and L bands.…”

Πολυμερική Τεχνολογία Διαμορφωτών Και Σχεδίαση Οπτικών Κόμβων Για Υψίρρυθμες Και Ευέλικτες Οπτικές Διασυνδέσεις Εντός Και Μεταξύ Υπολογιστικών Κέντρων

“…Το σύστημα θέρμανσης πυθμένα χρησιμοποιείται ευρέως σε συντονιζόμενες συσκευές λέιζερ, εξασφαλίζοντας επίσης μια μακροπρόθεσμη αξιόπιστη λειτουργία [119][120][121]. Ο πλευρικός θερμαντήρας είναι κατάλληλος για την αύξηση θερμοκρασίας στα επίπεδα οπτικά κυκλώματα (PLCs) στην κάθετη κατεύθυνση Χ και αποδεικνύεται χρήσιμος σε συσκευές που στηρίζονται στη διαφορά του δείκτη διάθλασης μεταξύ των στοιχείων [122,123]. Για μια επιλεγμένη διάταξη θερμαντήρων, οι δομικές παράμετροι όπως το μέγεθος της κορυφογραμμής του πολυμερούς, το πάχος του υποστρώματος και οι διαστάσεις του αεραγωγού μπορούν να ποικίλουν για να επιβραδύνουν τη θερμική μεταφορά και να βελτιώσουν την απόδοση θέρμανσης.…”