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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
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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...
Microlens Array Fabricated by Excimer Laser Micromachining with Gray-tone Photolithography
excimer laser gray-tone photolithography SIL
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2011/11/28
We demonstrate the fabrication of a refractive microlens array by using 248 nm excimer laser micromachining with coded gray-tone mask photolithography. With pre-corrections to the nonlinear exposure p...
A Cost-effective Pilot-Tone-based Monitoring Technique for Power Saving in RSOA-based WDM-PON
Cost-effective Pilot-Tone-based Monitoring Technique Power Saving RSOA-based WDM-PON
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2015/5/21
We propose and experimentally demonstrate a simple and novel monitoring technique with the modulation of RSOA’s ASE by the pilot-tone monitoring signal at the ONU, to provide power saving in RSOA-base...
An Optimal Tone Reservation Method for IM/DD Optical OFDM Transmission in Multimode Fiber
Optimal Tone Reservation Method IM/DD Optical OFDM Transmission Multimode Fiber
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2015/5/20
We propose an optimal, yet efficient tone reservation method which enables distortion-free IM/DD optical OFDM transmission with no additional bias. Compared to previous approaches, both spectral and p...
High Bit Rate Transmission for NG-PON by Direct Modulation of DFB Laser using Discrete Multi-Tone
Transmission NG-PON Direct Modulation DFB Discrete Multi-Tone
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2015/7/16
A bit rate as high as 19Gbit/s transmission was experimentally demonstrated for NG-PON without chromatic dispersion compensation by direct modulation of DFB laser using DMT signal combined with adapti...
Experimental Demonstration of Compensating the I/Q Imbalance and Bias Deviation of the Mach-Zehnder Modulator for an RF-Tone Assisted Optical OFDM System
Compensating I/Q Imbalance Bias Deviation Mach-Zehnder Modulator RF-Tone Assisted Optical OFDM System
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2015/7/30
We demonstrate an equalization technique to compensate for impairments induced by dispersion as well as I/Q imbalance and bias deviation in the MZM. The proposed scheme has a 2 dB improvement in back ...