Jai Sang Koh

Prediction of TEC power consumption for cooled laser diode module

In this study, the power consumption of TEC (thermoelectric cooler) is predicted using 3-D thermal FEM simulation and compared with experimental result. In addition to that, the effect of TEC configuration defined with the dimension and the number of pellets is discussed using commercialized product (RMT 1ML06-035-09AN) and its database to investigate the size effect. Results show that the cooling capacity of the TEC increases with increasing TEC pellet number. The power consumption of the module which the LD chip operates at 40 /spl deg/C dramatically decreases with power consumption equal to 1/3 of the laser diode module operating at 25 /spl deg/C.

Self-amplified passive optical network using 8B10B line coding properties in Gigabit-Ethernet protocol

A cost-effective self-amplified network in a Gigabit-Ethernet passive optical network is demonstrated using 8B10B line coding properties. We explain the operational principles and experimental results including transmitter and receiver margin for an upstream channel.

Low Cost WDM-PON source amplification scheme using bidirectional semiconductor linear optical amplifier

A cost-effective and compact WDM-PON source amplification scheme with bidirectional semiconductor optical amplifier is firstly demonstrated. A linear optical amplifier is used as a bidirectional amplifier to obtain the gain clamping of downstream channels and suppress the cross-gain modulation between upstream and downstream channels. We show the experimental results including the transient responses with a dynamic wavelength channel add/drop in WDM-PON.

Fiber-in-line optical transceiver structure using silicon V-groove and tilted-fiber gratings

A novel fiber-in-line optical transceiver structure by focusing the outgoing radiation from a tilted and chirped fiber Bragg grating is proposed. The chirped gratings with 45° tilted angle is designed for an optimum input coupling at 1.55 μm and a FDTD method is used for analysis. Experimental results on beam focusing are shown. We expect this novel design can be used for a low-cost receiver in the bi-directional fiber-in-line optical transceiver.