Pop-up direcionar para página já aberta - JSF

<script language="JavaScript">
            function abrir(URL) {

                var width = 400;
                var height = 300;

                var left = 99;
                var top = 99;

                window.open(URL,'janela', 'width='+width+', height='+height+', top='+top+', left='+left+', scrollbars=yes, status=no, toolbar=no, location=no, directories=no, menubar=no, resizable=no, fullscreen=no');

            }
        </script>

        <a href="javascript:abrir('buscaAcademico.faces');">Buscar</a>

<f:view>
            <a4j:form>
                <rich:panel header="Consulta Acadêmico">                                        
                    <rich:dataTable border="1" var="academico" value="#{AcademicoBean.listaAcademicos}">
                        <rich:column>
                            <f:facet name="header">
                                <h:outputText value="Matricula"/>
                            </f:facet>
                            <h:commandLink value="#{academico.matricula}" action="retornoAcademico" target="_blank">//Atenção para esta linha!
                                <f:setPropertyActionListener target="#{AcademicoBean.academico}" value="#{academico}"/>
                            </h:commandLink>
                        </rich:column>
                        <rich:column>
                            <f:facet name="header">
                                <h:outputText value="Nome"/>
                            </f:facet>
                            <h:outputText value="#{academico.nome}"/>
                        </rich:column>
                    </rich:dataTable>
                </rich:panel><br>
                <a href="cadastroPreprojeto.faces">Cancelar</a>
            </a4j:form>
        </f:view>