Bingzhou Hong

High intrinsic modulation bandwidth InGaAsP/InGaAsP 1.55 µm asymmetric active multimode interferometer laser diode by using split pump configuration

1.55 µm InGaAsP/InGaAsP multiple quantum well (MQW) asymmetric active multimode laser diode (active MMI-LD) with split pumping scheme has been demonstrated. Asymmeric configuration ensures the singlewavelength output from the designed device. Moreover, the advantage of having large multimode active pumping section behind the splitted modulation section is the key contributor for having higher photon density in modulation section without increasing the device length. By utilizing the split pump configuration in the designed active MMI-LD, high intrinsic 3 dB modulation bandwidth of 24.6 GHz is achieved. To the best of our knowledge this is the highest reported intrinsic modulation bandwidth for active MMI-LD. Required photon density to achieve more than 40 GHz 3 dB bandwidth for direct modulation is also clarified.

Demonstration of photon-photon resonance peak enhancement by waveguide design modification on active multimode interferometer laser diode

Photon-photon resonance (PPR) peak enhancement on active multimode interferometer laser diode is demonstrated. 3.8 GHz enhancement of PPR peak that results in 3 dB-down frequency response of 17 GHz has been successfully achieved by waveguide geometry modification.

Bandwidth enhancement scheme demonstration on direct modulation active-MMI laser diode using multiple photon photon resonance

By introducing properly designed multiple photo photon resonances (PPRs) on an active-Multimode Interferometer Laser Diode, the confirmed direct modulation bandwidth was enhanced from less than 5 GHz to at least 34 GHz. Multiple oscillating cavities that have slightly different free space ranges (FSRs) are integrated within a single device. The overlap between such FSRs contributes to multiple wavelength differences that are directly related to the PPR frequencies. Evaluated PPR frequencies from experimental data match with designed frequencies. The potential of the 100 GHz level bandwidth of the device has been proved.

Theoretical modelling of photon-photon resonance on active multimode interferometer laser diode toward 40Gbps

Theoretical modelling of photon-photon resonance is confirmed on active MMI LD for the first time. As a result, experimentally obtained resonance peak on active MMI LD of 15GHz is explained successfully.

Multiple photon photon resonance by using active-multimode interferometer laser diode

Active-multimode interferometer laser diode that integrates at least six oscillating cavities has been achieved successfully. Multiple cavities contribute to multiple longitudinal mode spacings as well as multiple PPR frequencies. Device aiming 100 GHz bandwidth design principle is proposed.

Bandwidth Enhancement Scheme Demonstration (from 5 GHz to 34 GHz) on Direct Modulation Laser Diode Using Multiple PPR (Photon-Photon Resonance) Active MMI

Multiple cavity active-Multimode Interferometer Laser Diode demonstrates multiple photon-photon resonances (8 GHz, 10 GHz, 13 GHz, 19 GHz, 23 GHz and 36 GHz) for the first time. Modulation bandwidth of at least 34 GHz was confirmed.