Solid optical ring interferometer for high-throughput feedback-free spectral analysis and filtering.
We describe a simple and inexpensive optical ring interferometer for use in high-resolution spectral analysis and filtering. It consists of a solid cuboid, reflection-coated on two opposite sides, in which constructive interference occurs for waves in a rhombic trajectory. Due to its monolithic design, the interferometer's resonance frequencies are insensitive to environmental disturbances over time. Additional advantages are its simplicity of alignment, high-throughput, and feedback-free operation. If desired, it can be stabilized with a secondary laser without disturbance of the primary signal. We illustrate the use of the interferometer for the measurement of the spectral Mollow triplet from a quantum dot and characterize its long-term stability for filtering applications.
Department of Physics, University of South Florida, Tampa, Florida 33620, USA.
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B
Petrak
Department of Physics, University of South Florida, Tampa, Florida 33620, USA.
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M
Peiris
Department of Physics, University of South Florida, Tampa, Florida 33620, USA.
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Muller