Spectral changes induced by a phase modulator acting as a time lens
We show both numerically and experimentally that a phase modulator, acting as a time lens in the Fourier-lens configuration, can induce spectral broadening, narrowing, or shifts, depending on the phase of the modulator cycle. These spectral effects depend on the maximum phase shift that can be imposed by the modulator. In our numerical simulations, pulse spectrum could be compressed by a factor of 8 for a 30 rad phase shift. Experimentally, spectral shifts over a 1.35 nm range and spectral narrowing and broadening by a factor of 2 were demonstrated using a lithium niobate phase modulator with a maximum phase shift of 16 rad at a 10 GHz modulation frequency. All spectral changes were accomplished without employing optical nonlinear effects such as self- or cross-phase modulation.
- Univ. of Rochester, Rochester, NY (United States). Inst. of Optics.
- Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
- Univ. of Rochester, Rochester, NY (United States). Inst. of Optics; Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics.
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- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: Journal of the Optical Society of America. Part B, Optical Physics; Journal Volume: 32; Journal Issue: 8
- Optical Society of America (OSA)
- Research Org:
- Univ. of Rochester, Rochester, NY (United States). Laboratory for Laser Energetics
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- Country of Publication:
- United States
- 42 ENGINEERING optical processing devices; modulators