Suppression of Relative Intensity and Mode Partition Noises in Orthogonally Polarized Dual-Wavelength VCSEL

Wang, Huai‐Yung; Cheng, Chih-Hsien; Lin, Gong‐Ru

doi:10.1109/jlt.2020.3017208

Cited by 3 publications

(3 citation statements)

References 43 publications

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“…Transverse modes will compete in inhomogeneous carrier distribution to affect the dynamic response in VCSELs. with the designs of L-OA-7.5/S-OA-7.5 increase the RIN value [41,42], as confirm Figure 7. At a high mode intensity point, the stimulated recombination depletes the local carriers and produces a hole in the carrier distribution.…”

Section: Rin and Mpn Of The Mm-vcsels With Different Designssupporting

confidence: 62%

“…Because of the larger optical volume and lower photon density, the higher RIN values are observed for the MM-VCSELs with the larger oxide aperture from the experimental results. At the low bias current, the lower damping factor and lower resonance frequency induced by the lower photon density for the MM-VCSEL with the designs of L-OA-7.5/S-OA-7.5 increase the RIN value [41,42], as confirmed by Figure 7. GHz/mA 0.5 .…”

Section: Rin and Mpn Of The Mm-vcsels With Different Designsmentioning

confidence: 83%

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Effect of Transmission-Line Contact Length on the 50-Gbit/s Data Encoding Performance of a Multimode VCSEL

Weng

Wang³

et al. 2022

Photonics

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Directly modulated 850-nm multimode vertical-cavity surface-emitting lasers (MM-VCSELs) with different oxide apertures and transmission microstrip lengths are compared on the transmission performance of the non-return-to-zero on-off keying (NRZ-OOK) and four-level pulse amplitude modulation (PAM-4) data formats. In this work, intrinsic and extrinsic responses of the MM-VCSEL are also discussed concurrently. By tuning the length of the transmission microstrip in VCSEL, the low reflection coefficient and the enhanced 3-dB modulation bandwidth are achieved. The inductance of the transmission microstrip in the series connection with the capacitance in the active region is optimized to reduce the power loss induced by imaginary impedance. The different oxide aperture sizes for MM-VCSEL are also studied to control the capacitance and photon density. More importantly, the 3-dB modulation bandwidth, impedance matching, slope efficiency, relative intensity noise (RIN), and mode partition noise (MPN) for the MM-VCSEL with various designs are discussed to determine the best device with the high-speed transmission capability. The optimal MM-VCSEL with a diameter of 7 µm oxide aperture and a length of 25 µm transmission microstrip successfully demonstrates 50-Gbit/s OOK and 84-Gbit/s PAM4 after using the pre-emphasis technique for future data-center applications.

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Section: Rin and Mpn Of The Mm-vcsels With Different Designssupporting

confidence: 62%

Section: Rin and Mpn Of The Mm-vcsels With Different Designsmentioning

confidence: 83%

Effect of Transmission-Line Contact Length on the 50-Gbit/s Data Encoding Performance of a Multimode VCSEL

Weng

Wang³

et al. 2022

Photonics

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“…Obviously, the relaxation oscillation peak is upshifted to the high frequency. Its power is gradually reduced as the bias current increases [33], [34]. This phenomenon can effectively suppress the noise, which is beneficial for transmission.…”

Section: A the Basic Characteristic Of The Dm-vcselmentioning

confidence: 97%

Comparing the Dual-Mode VCSEL in OM4-MMF and GI-SMF Links for NRZ-OOK and 16-QAM-OFDM Transmissions

et al. 2022

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A dual-mode (DM) vertical-cavity surface-emitting laser (VCSEL) is investigated for carrying high-speed data transmission with either the non-return-zero on-off keying (NRZ-OOK) or the quadrature amplitude modulation-orthogonal frequency division multiplexing (QAM-OFDM) format. In both the back-toback (BtB) and the 100-m transmission cases with using either the OM4 multimode fiber (OM4-MMF) or the graded-index singlemode fiber (GI-SMF), the mismatch between the core diameter of the lensed MMF pick-up head and the mode field of the DM-VCSEL output controls the coupled transverse mode number and decrease the modal dispersion effect. Using pre-emphasized NRZ-OOK data can compensate the SNR degradation to improve the BER to 5.6 × 10 −12 under BtB and 6.9 × 10 −10 after 100-m GI-SMF for the DM-VCSEL delivered NRZ-OOK data at 53 Gbit/s. For 16-QAM OFDM transmission, the pre-leveling algorithm shows better data compensation than the pre-emphasis algorithm in both BtB and the 100-m GI-SMF cases. With the pre-leveling compensation of the 16-QAM OFDM data encoded to the DM-VCSEL with a 0.4-dB/GHz slope, the DM-VCSEL allows 136 Gbit/s for BtB, 112 Gbit/s for 100-m OM4-MMF, and 92 Gbit/s for 100-m GI-SMF transmissions. The pre-emphasis NRZ-OOK and the pre-leveling 16-QAM OFDM data carried by the DM-VCSEL can be used in ultrahigh-speed intra-data-center links in the future.

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Ge p-i-n Photodiode as 60-Gbit/s Optical NRZ-OOK Data Receiver

Chung

Kao

et al. 2022

J. Lightwave Technol.

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Suppression of Relative Intensity and Mode Partition Noises in Orthogonally Polarized Dual-Wavelength VCSEL

Cited by 3 publications

References 43 publications

Effect of Transmission-Line Contact Length on the 50-Gbit/s Data Encoding Performance of a Multimode VCSEL

Effect of Transmission-Line Contact Length on the 50-Gbit/s Data Encoding Performance of a Multimode VCSEL

Comparing the Dual-Mode VCSEL in OM4-MMF and GI-SMF Links for NRZ-OOK and 16-QAM-OFDM Transmissions

Ge p-i-n Photodiode as 60-Gbit/s Optical NRZ-OOK Data Receiver

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