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New Design Results in Compact,Highly Efficient Frequency Comb
New Design Results Compact Highly Efficient Frequency Comb
2017/3/30
Northwestern Engineering researchers have designed a quantum cascade laser (QCL) frequency comb that is dramatically more efficient than previous iterations. Led by Manijeh Razeghi, researchers i...
Frequency combs are the rulers of light. By counting a wavelength’s many oscillations, they measure distance and time with extraordinary precision and speed.
Since the discovery of optical frequency ...
Generation of 1500-tone, 120nm-wide Ultraflat Frequency Comb by Single CW Source
Generation of 1500-tone 120 nm-wide Ultraflat Frequency Comb Single CW Source
2014/11/6
Dense 1500-tone frequency comb is derived from a single CW laser. Sub-2dB flatness was measured over 120 nm, with 40 dB optical signal-to-noise-ratio. The new generator uses regenerative shock formati...
Microwave Photonic Filters with a Directly Generated Gaussian-shaped Optical Frequency Comb
Microwave Photonic Filters Directly Generated Gaussian-shaped Optical Frequency Comb
2015/5/21
Using electro-optic modulators, we generate a 41-line 10-GHz spaced Gaussian-shaped optical comb. We use this comb to demonstrate apodized microwave photonic filters with greater than 43-dB sidelobe s...
A Broadband, Spectrally Flat, High Rep-rate Frequency Comb: Bandwidth Scaling and Flatness Enhancement of Phase Modulated CW through Cascaded Four-Wave Mixing
Broadband Spectrally Flat High Rep-rate Frequency Comb Bandwidth Scaling Flatness Enhancement Phase Modulated CW Cascaded Four-Wave Mixing
2015/5/20
We demonstrate a scheme to scale the bandwidth by several times while enhancing spectral flatness of frequency combs generated by intensity and phase modulation of CW lasers using cascaded four-wave m...
Optical Frequency Comb Generators Based on Fabry-Perot Electro-Optic Modulation
Optical frequency comb generator Fabry-Perot electro-optic modulator Optical frequency standard
2009/6/12
Optical frequency comb generators based on Fabry-Perot electro-optic modulator and its applications were introduced. The applications have been spreading beyond the first purpose as an optical frequen...
A Filtered Optical Frequency Comb Generator as a Stable and Tunable Short Pulse Source
Filtered Optical Frequency Comb Generator Tunable Short Pulse Source
2015/7/31
Phase characteristics of pulses from an optical frequency comb generator are studied. Simple filtering is shown suitable for generating stable high quality short pulses of an adjustable pulse width.