Determining the stable injection locking of a Fabry-Pérot laser by observing the RF spectral components generated by a low-reflectivity external cavity

Ratkoceri, Jakup (avtor), Batagelj, Boštjan (avtor)

A novel approach to monitoring the laser injection-locking (IL) state is proposed and verified using the side-mode suppression ratio (SMSR). In a photonics experiment for laser IL, an optical spectrum analyzer with the conventional criterion of a 35-dB SMSR is conventionally used to detect the locking state of a Fabry–Pérot (FP) laser with multiple longitudinal modes to an external master laser with one longitudinal mode. Since the 35-dB criterion is not always a sufficient locking condition, we propose a microwave-photonic technique to determine the stable-locking regime based on the observation of the radio-frequency (RF) components. A novel approach to monitoring the generated additional spectral components uses the well-known delayed-self-homodyne technique and the RF spectrum analyzer. For the novel generation of additional longitudinal groups on each FP laser’s resonator mode in the optical spectrum and consequently the overlapping RF components in the RF spectrum, an additional external resonator with low reflectivity was connected to the slave FP laser. The novel monitoring approach was experimentally verified by connecting a 1-m-long external cavity with 0.5% reflectivity and observing the optical IL phenomenon of a 1550-nm FP semiconductor laser.

• Jezik: Angleški jezik
• Ključne besede: Fabry–Pérot laser diode, semiconductor laser, injection locking, microwave photonics, mode-locked laser, locking range, linewidth, self-homodyne technique, external cavity
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 13 str.
• Številčenje: Vol. 8, iss. 11, art. 487
• PID: 20.500.12556/RUL-136423
• UDK: 621.39
• ISSN pri članku: 2304-6732
• DOI: 10.3390/photonics8110487
• COBISS.SI-ID: 83025667
• Datum objave v RUL: 03.05.2022

Gradivo je del revije

• Naslov: Photonics
• Skrajšan naslov: Photonics
• Založnik: MDPI AG
• ISSN: 2304-6732
• COBISS.SI-ID: 523331609

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.11.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: Fabry-Pérotova laserska dioda, polprevodniški laser, rodovna vklenitev, mikrovalovna fotonika

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0246
• Naslov: ICT4QoL - Informacijsko komunikacijske tehnologije za kakovostno življenje

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: COST
• Številka projekta: CA16220
• Naslov: European Network for the High-Performance Integrated Microwave Photonics
• Akronim: EUIMWP