25-Gb/s Multichannel 1.3-$\mu$m Surface-Emitting Lens-Integrated DFB Laser Arrays

Adachi, K.; Shinoda, Kazunori; Kitatani, T.; Fukamachi, T.; Matsuoka, Y.; Sugawara, Toshiki; Tsuji, S.

doi:10.1109/jlt.2011.2163814

Cited by 41 publications

(13 citation statements)

References 24 publications

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“…These values of the threshold current are the lowest values among those of high-speed edge-emitting lasers operating above 20 Gb/s so far reported, to our knowledge. The measured series resistance was 10 , which is comparable to that of the 25 and 28-Gb/s lasers [9]- [12].…”

Section: Device Structuresupporting

confidence: 59%

“…The epitaxial layers of the device were grown on an n-InP substrate by low-pressure metal-organic chemical vapor deposition (LP-MOCVD). The active layer consists of undoped InGaAlAs MQW and SCHs layers, which are the same as those of 25-Gb/s and 28-Gb/s lasers [9]- [12]. The current blocking layers that consist of a semi-insulated semiconductor are buried adjacently on both the sides of the grating, the MQW with SCHs, and n-InP cladding layers.…”

Section: Device Structurementioning

confidence: 99%

“…The length of the laser along the optical axis with integrated passive waveguide is 170 μm. The laser has an asymmetric corrugation-pitchmodulated (ACPM) grating to reduce roll-off response at low frequency region [9], [10]. The grating is only formed on the MQW with SCHs region.…”

Section: Device Structurementioning

confidence: 99%

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Direct Modulation at 56 and 50 Gb/s of 1.3-<inline-formula> <tex-math notation="LaTeX">$\mu $ </tex-math></inline-formula>m InGaAlAs Ridge-Shaped-BH DFB Lasers

Nakahara

Wakayama

Kitatani

et al. 2015

IEEE Photon. Technol. Lett.

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Direct modulation at 56 and 50 Gb/s of 1.3-µm InGaAlAs ridge-shaped-buried heterostructure (RS-BH) asymmetric corrugation-pitch-modulation (ACPM) distributed feedback lasers is experimentally demonstrated. The fabricated lasers have a low threshold current (5.6 mA at 85°C), high temperature characteristics (71 K), high slope relaxation frequency (3.2 GHz/mA 1/2 at 85°C), and wide bandwidth (22.1 GHz at 85°C). These superior properties enable the lasers to run at 56 Gb/s and 55°C and 50 Gb/s at up to 80°C for backto-back operation with clear eye openings. This is achieved by the combination of a low-leakage RS-BH and an ACPM grating. Moreover, successful transmission of 56-and 50-Gb/s modulated signals over a 10-km standard single-mode fiber is achieved. These results confirm the suitability of this type of laser for use as a cost-effective light source in 400 GbE and OTU5 applications. IndexTerms-Buried heterostructure, distributed feedback (DFB) lasers, quantum well lasers.

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Section: Device Structuresupporting

confidence: 59%

Section: Device Structurementioning

confidence: 99%

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Direct Modulation at 56 and 50 Gb/s of 1.3-<inline-formula> <tex-math notation="LaTeX">$\mu $ </tex-math></inline-formula>m InGaAlAs Ridge-Shaped-BH DFB Lasers

Nakahara

Wakayama

Kitatani

et al. 2015

IEEE Photon. Technol. Lett.

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“…3(d). The rest of the basic device structure was almost the same as a previously reported high-speed design [10]. For achieving high-speed (25.8 Gbps/ch) operation, a short cavity (150-µm length) with high gain AlGaInAs active layer was adopted.…”

Section: Device Design and Fabrication Processmentioning

confidence: 99%

Monolithically integrated 4 ch × 25.8 Gbps lens-integrated surface-emitting DFB laser array directly coupled to SMF

Adachi

Suzuki

Takei

et al. 2016

IEICE Electron. Express

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Direct optical coupling and a 4 × 25.8-Gbps 2-km optical link were demonstrated simultaneously by using a lens-integrated surface-emitting DFB laser (LISEL) array for a low-cost multi-lane optical module. The integrated lens was optimized so that the LISEL had a focused beam, resulting in high-efficiency (−3.5 dB) direct optical coupling to a SMF. Thanks to its short DFB cavity with high-gain InGaAlAs active layer, the LISEL array demonstrated 4 × 25.8-Gbps 2-km error-free transmission. Moreover, it achieved error-free transmission up to 70°C.

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“…A lens-integrated surface-emitting DFB laser (LISEL) was previously developed by the authors for a low-cost optical module [6]. In the LISEL, a 45°mirror and a lens are monolithically integrated to a DFB cavity.…”

Section: Introductionmentioning

confidence: 99%

A facet-free 1.3-µm surface-emitting DFB laser for a low-cost optical module

Adachi

Suzuki

Nakahara

et al. 2016

IEICE Electron. Express

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A facet-free surface-emitting distributed feed-back (DFB) laser is proposed for a low-cost optical module. A 45°mirror is integrated on front of a DFB laser for surface emission. Instead of a facet with a high-reflection (HR) coating, a distributed Bragg reflector mirror, a photodiode, and a window structure are integrated on its rear. It is experimentally confirmed this rear structure work same as the facet with the HR coating. The proposed facet-free laser demonstrated on-wafer measurement and attained high-reliability under high humidity. These results indicate the proposed laser can be manufactured cost-effectively without chip-level screenings and used in nonhermetic packages.

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25-Gb/s Multichannel 1.3-$\mu$m Surface-Emitting Lens-Integrated DFB Laser Arrays

Cited by 41 publications

References 24 publications

Direct Modulation at 56 and 50 Gb/s of 1.3-<inline-formula> <tex-math notation="LaTeX">$\mu $ </tex-math></inline-formula>m InGaAlAs Ridge-Shaped-BH DFB Lasers

Direct Modulation at 56 and 50 Gb/s of 1.3-<inline-formula> <tex-math notation="LaTeX">$\mu $ </tex-math></inline-formula>m InGaAlAs Ridge-Shaped-BH DFB Lasers

Monolithically integrated 4 ch × 25.8 Gbps lens-integrated surface-emitting DFB laser array directly coupled to SMF

A facet-free 1.3-µm surface-emitting DFB laser for a low-cost optical module

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