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nine days). The discharge and charge currents were 0.5 and 0,3 mA, respectively. The discharge and charge were terminated at a Li/Fe of 0.4. Although the first discharge curve was different from the subsequent ones, the ceil showed excellent performance over twenty cycles. A very interesting observation is that the cell voltage at the end of the first and subsequent discharges is higher than the voltage before the first discharge. This has been observed with cells using the NbSe3 cathode (10). This phenomenon is related to the discharge and charge mechanism. This is currently being investigated, and will be discussed in future communications.

We report the spectral characteristics of AlGaAs-GaAs multiple-quantum-wire (QWR) lasers fabricated by flow rate modulation epitaxy on V-grooved substrates. Room-temperature lasing from the fundamental state (1e-1hh) is generally observed in devices longer than 350 µm; however, secondary peaks at the adjacent higher subbands are immediately detected following current injection. The evolution of the stimulated emission spectra is investigated here. Typical threshold current and the wavelength tuning rate of current are observed to be 6.2 mA and 0.012 nm/mA, respectively, for 800-µm-long uncoated cavities.

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