DFB Laser Injection-Locked to PM Fiber Ring Cavity with 75-Hz Lorentzian Linewidth
Panyaev, Ivan; Itrin, Pavel; Korobko, Dmitry; Yavtushenko, Igor; Mégret, Patrice; Fotiadi, Andrei (2024-06-20)
SPIE
20.06.2024
Ivan Panyaev, Pavel Itrin, Dmitry Korobko, Igor Yavtushenko, Patrice Mégret, and Andrei Fotiadi "DFB laser injection-locked to PM fiber ring cavity with 75-Hz Lorentzian linewidth", Proc. SPIE 13002, Semiconductor Lasers and Laser Dynamics XI, 130020Q (20 June 2024); https://doi.org/10.1117/12.3022414
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Copyright 2024 Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited.
https://rightsstatements.org/vocab/InC/1.0/
Copyright 2024 Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited.
https://rightsstatements.org/vocab/InC/1.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202412107158
https://urn.fi/URN:NBN:fi:oulu-202412107158
Tiivistelmä
Abstract
Low-noise lasers are critical in precision spectroscopy, displacement measurements, and optical atomic clock development. These fields require lasers with minimal frequency noise, combining cost-effectiveness with robust design. We introduce a simple, single-frequency laser that uses a ring fiber cavity for self-injection locking in a standard semiconductor distributed feedback (DFB) laser. Our design, unique in its use of polarization-maintaining (PM) singlemode optical fiber components, offers a maintenance-free operation and enhanced stability against environmental noise. Achieving continuous wave (CW) single-frequency operation, it maintains this state with low-bandwidth active optoelectronic feedback. The laser operates at ~8 mW, reducing the Lorentzian linewidth to ~75 Hz and achieving phase and intensity noise levels below –120 dBc/Hz and –140 dBc/Hz, respectively. Additionally, its thermal stabilization limits frequency drift to < 0.5 MHz/min with a maximum deviation of < 8 MHz. Implementing this design in integrated photonics could significantly cut costs and space requirements in high-capacity fiber networks, data centers, atomic clocks, and microwave photonics.
Low-noise lasers are critical in precision spectroscopy, displacement measurements, and optical atomic clock development. These fields require lasers with minimal frequency noise, combining cost-effectiveness with robust design. We introduce a simple, single-frequency laser that uses a ring fiber cavity for self-injection locking in a standard semiconductor distributed feedback (DFB) laser. Our design, unique in its use of polarization-maintaining (PM) singlemode optical fiber components, offers a maintenance-free operation and enhanced stability against environmental noise. Achieving continuous wave (CW) single-frequency operation, it maintains this state with low-bandwidth active optoelectronic feedback. The laser operates at ~8 mW, reducing the Lorentzian linewidth to ~75 Hz and achieving phase and intensity noise levels below –120 dBc/Hz and –140 dBc/Hz, respectively. Additionally, its thermal stabilization limits frequency drift to < 0.5 MHz/min with a maximum deviation of < 8 MHz. Implementing this design in integrated photonics could significantly cut costs and space requirements in high-capacity fiber networks, data centers, atomic clocks, and microwave photonics.
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