

   BBeellllccoorree EExxppeerriimmeennttaall LLaasseerr DDaattaa

        data(laser)

   FFoorrmmaatt::

        A data frame with observations on the variables `If'
        and `Ir' (the currents applied to the front and rear of
        the laser), and `power' and `lambda' (the output power
        and wavelength).

   DDeessccrriippttiioonn::

        This data came from an investigation of an experimental
        laser at Bellcore.  It was a tunable laser, in the
        sense that both its wavelength and power output were
        controllable.

   DDeettaaiillss::

        Rotation helped the experimental physicists to charac
        terize the laser, which turned out not to be a very
        good one, due to its unstable operating region.

        This data initially came to the statistics research
        group when Janette Cooper asked Paul Tukey to help her
        analyze the data she had collected to describe the
        laser.

