Low noise resonant amplification by optical injection-locking and residual phase noise cancellation
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914493233102848 |
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| author | Simmons, Y. Lange Greenberg, James Heffernan, Brendan M. Rolland, Antoine |
| author_facet | Simmons, Y. Lange Greenberg, James Heffernan, Brendan M. Rolland, Antoine |
| contents | We demonstrate a low noise, high-gain, resonant optical amplifier that combines injection locking with feed-forward cancellation of residual phase noise. The wavelength-agnostic architecture uses a commercial semiconductor diode laser as a power amplifier while preserving the spectral purity of a weak reference. Although injection locking enforces phase coherence, finite residual phase noise within the locking regime limits high-fidelity transfer of low phase noise from the reference laser to the injection-locked laser, particularly at large gain. Here, the residual phase error is measured via optical heterodyne detection and canceled using feed-forward phase correction. Compared to injection locking alone, the amplifier achieves up to 38 dB phase-noise reduction at Fourier frequencies above 1 kHz for injection ratios down to -57 dB. This approach enables ASE-free amplification of low-power, low-noise optical references, including individual lines from optical frequency combs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_18772 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Low noise resonant amplification by optical injection-locking and residual phase noise cancellation Simmons, Y. Lange Greenberg, James Heffernan, Brendan M. Rolland, Antoine Optics We demonstrate a low noise, high-gain, resonant optical amplifier that combines injection locking with feed-forward cancellation of residual phase noise. The wavelength-agnostic architecture uses a commercial semiconductor diode laser as a power amplifier while preserving the spectral purity of a weak reference. Although injection locking enforces phase coherence, finite residual phase noise within the locking regime limits high-fidelity transfer of low phase noise from the reference laser to the injection-locked laser, particularly at large gain. Here, the residual phase error is measured via optical heterodyne detection and canceled using feed-forward phase correction. Compared to injection locking alone, the amplifier achieves up to 38 dB phase-noise reduction at Fourier frequencies above 1 kHz for injection ratios down to -57 dB. This approach enables ASE-free amplification of low-power, low-noise optical references, including individual lines from optical frequency combs. |
| title | Low noise resonant amplification by optical injection-locking and residual phase noise cancellation |
| topic | Optics |
| url | https://arxiv.org/abs/2604.18772 |