Direct Modulation of Semiconductor Lasers

Hunsperger, Robert G.

doi:10.1007/978-3-662-03159-9_14

Cited by 1 publication

(1 citation statement)

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“…It has been well known that biasing a VCSEL above threshold eliminates the initial VCSEL turn-on delay experienced by direct VCSEL modulation. 19 The trade-off is made in favor of power consumption here by choosing direct VCSEL modulation. To do this, a CMOS signal is used to turn on͞off the VCSEL biasing DAC depending on the current transmitting logic values.…”

Section: B Megabit Transceiver Designmentioning

confidence: 99%

2 Gbit/s 05 μm complementary metal-oxide semiconductor optical transceiver with event-driven dynamic power-on capability

et al. 2006

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A 2 Gb/s0.5 microm complementary metal-oxide semiconductor optical transceiver designed for board- or backplane level power-efficient interconnections is presented. The transceiver supports optical wake-on-link (OWL), an event-driven dynamic power-on technique. Depending on external events, the transceiver resides in either the active mode or the sleep mode and switches accordingly. The active-to-sleep transition shuts off the normal, gigabit link and turns on dedicated circuits to establish a low-power (approximately 1.8 mW), low data rate (less than 100 Mbits/s) link. In contrast the normal, gigabit link consumes over 100 mW. Similarly the sleep-to-active transition shuts off the low-power link and turns on the normal, gigabit link. The low-power link, sharing the same optical channel with the normal, gigabit link, is used to achieve transmitter/receiver pair power-on synchronization and greatly reduces the power consumption of the transceiver. A free-space optical platform was built to evaluate the transceiver performance. The experiment successfully demonstrated the event-driven dynamic power-on operation. To our knowledge, this is the first time a dynamic power-on scheme has been implemented for optical interconnects. The areas of the circuits that implement the low-power link are approximately one-tenth of the areas of the gigabit link circuits.

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Section: B Megabit Transceiver Designmentioning

confidence: 99%