Reducing the noise of fiber supercontinuum sources to its limits by exploiting cascaded soliton and wave breaking nonlinear dynamics

Sierro, Benoît; Hänzi, Pascal; Spangenberg, Dirk; Rampur, Anupamaa; Heidt, Alexander M. (2022). Reducing the noise of fiber supercontinuum sources to its limits by exploiting cascaded soliton and wave breaking nonlinear dynamics. Optica, 9(4), pp. 352-359. Optical Society of America 10.1364/OPTICA.450505

[img] Text
Sierro2022_-_Reducing_the_Noise_of_Fiber_Supercontinuum_Sources_to_Its_Limits_by_Exploiting_Cascaded_Soliton_and_Wave_Breaking_Nonlinear_Dynamics.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (3MB) | Request a copy
[img] Text
Sierro2022_-_Optica.pdf - Supplemental Material
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (4MB) | Request a copy

The low-noise and phase-coherent nonlinear transformation of a narrowband laser into a broadband supercontinuum (SC) in an optical fiber forms the basis of extremely precise applications ranging from optical frequency comb technology to ultrafast photonics and biomedical imaging. A major challenge of this process is the avoidance of incoherent nonlinear effects that amplify random quantum noise, requiring careful birefringence and dispersion engineering of the fiber. However, fundamental trade-offs exist between working in normal or anomalous dispersion regimes. Here, we combine the benefits of nonlinear dynamics in both regimes by cascading soliton compression and optical wave breaking in a hybrid fiber, formed by joining two widely available, commercial, polarization-maintaining step-index fibers exhibiting anomalous and all-normal dispersion, respectively. We experimentally demonstrate that this hybrid approach results in an ultra-low-noise fiber SC source covering the 930–2130 nm range with phase coherence near unity, spectrally resolved relative intensity noise (RIN) as low as 0.05%, and averaging 0.1% over a bandwidth of 750 nm, approaching the theoretical limits close to the pump laser noise. This corresponds to a doubling of the generated spectral bandwidth and a decrease of RIN by up to 1 order of magnitude compared to direct pumping of the individual fibers, where modulational polarization instabilities play a limiting role. Owing to its simplicity and its scalability to high repetition rates, our hybrid scheme is readily applicable to various laser platforms and could enhance the performance of applications such as hyperspectral nonlinear microscopy, coherent optical communications, and photonic signal processing.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Lasers

UniBE Contributor:

Sierro, Benoît Guy Alain; Hänzi, Pascal Manuel; Spangenberg, Dirk-Mathys; Rampur, Anupamaa and Heidt, Alexander

Subjects:

600 Technology > 620 Engineering
500 Science
500 Science > 530 Physics

ISSN:

2334-2536

Publisher:

Optical Society of America

Language:

English

Submitter:

Simone Corry

Date Deposited:

23 May 2022 12:51

Last Modified:

23 May 2022 12:51

Publisher DOI:

10.1364/OPTICA.450505

BORIS DOI:

10.48350/170119

URI:

https://boris.unibe.ch/id/eprint/170119

Actions (login required)

Edit item Edit item
Provide Feedback