Silicon-thulium hybrid microdisk lasers with low threshold and wide emission wavelength range.
Opt Express
; 31(12): 20244-20255, 2023 Jun 05.
Article
in En
| MEDLINE
| ID: mdl-37381423
ABSTRACT
We demonstrate low-threshold and wide emission wavelength range hybrid-integrated silicon-thulium microdisk lasers based on a pulley-coupled design. The resonators are fabricated on a silicon-on-insulator platform using a standard foundry process and the gain medium is deposited using a straightforward, low-temperature post-processing step. We show lasing in 40- and 60-µm diameter microdisks with up to 2.6â
mW double-sided output power and bidirectional slope efficiencies of up to 13.4% with respect to 1620â
nm pump power launched to the bus waveguides. We observe thresholds less than 1â
mW versus on-chip pump power and both single-mode and multimode laser emission spanning across wavelengths from 1825 to 1939nm. These low threshold lasers with emissions over a > 100â
nm range open the door to monolithic silicon photonic integrated circuits with broadband optical gain and highly compact and efficient light sources in the emerging â¼1.8-2.0 µm wavelength band.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Opt Express
Journal subject:
OFTALMOLOGIA
Year:
2023
Document type:
Article