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rINSTCONTROL/@MyTlb6700/MyTlb6700.m
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MyTlb6700.m
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% Class for communication with NewFocus TLB6700 tunable laser controllers
% Needs UsbDllWrap.dll from Newport USB driver on Matlab path
%
% Start instrument as MyTlb6700('address','USBaddr'), where USBaddr
% is indicated in the instrument menu. Example: MyTlb6700('address', '1').
%
% This class uses MyNewportUsbComm, an instance of which needs to be shared
% between multiple devices, as the Newport driver, apparently, cannot
% handle concurrent calls.
classdef MyTlb6700 < MyScpiInstrument
properties (GetAccess = public, ...
SetAccess = {?MyClassParser, ?MyTlb6700})
% Interface field is not used in this instrument, but keep it
% for the sake of information
interface = 'usb';
address = '';
end
properties (GetAccess = public, SetAccess = protected)
% Instance of Newport.USBComm.USB used for communication.
% Must be shared between the devices
UsbComm
end
methods (Access = public)
function this = MyTlb6700(varargin)
P = MyClassParser(this);
processInputs(P, this, varargin{:});
% Convert address to number
this.address = str2double(this.address);
% Get the unique instance of control class for Newport driver
this.UsbComm = MyNewportUsbComm.instance();
createCommandList(this);
end
end
methods (Access = protected)
function createCommandList(this)
% Commands for this class do not start from ':', as the
% protocol does not fully comply with SCPI standard
addCommand(this, 'wavelength', 'SENSe:WAVElength', ...
'format', '%e', ...
'info', 'Output wavelength (nm)', ...
'access', 'r');
addCommand(this, 'current', 'SENSe:CURRent:DIODe', ...
'format', '%e', ...
'info', 'Diode current (mA)', ...
'access', 'r');
addCommand(this, 'temp_diode', 'SENSe:TEMPerature:DIODe', ...
'format', '%e', ...
'info', 'Diode temperature (C)', ...
'access', 'r');
addCommand(this, 'power', 'SENSe:POWer:DIODe', ...
'format', '%e', ...
'info', 'Output power (mW)', ...
'access', 'r');
addCommand(this, 'wavelength_sp', 'SOURce:WAVElength', ...
'format', '%e', ...
'info', 'Wavelength setpoint (nm)');
addCommand(this, 'const_power', 'SOURce:CPOWer', ...
'format', '%b', ...
'info', 'Constant power mode on/off');
addCommand(this, 'power_sp', 'SOURce:POWer:DIODe', ...
'format', '%e', ...
'info', 'Power setpoint (mW)');
addCommand(this, 'current_sp', 'SOURce:CURRent:DIODe', ...
'format', '%e', ...
'info', 'Current setpoint (mA)');
% Control mode local/remote
addCommand(this, 'control_mode', 'SYSTem:MCONtrol', ...
'format', '%s',...
'info', 'Control local/remote', ...
'value_list', {'LOC','REM'});
% Output on/off
addCommand(this, 'enable_output', 'OUTPut:STATe', ...
'format', '%b', ...
'info', 'on/off');
% Wavelength track on/off
addCommand(this, 'wavelength_track', 'OUTPut:TRACk', ...
'format', '%b', ...
'info', 'on/off');
% Wavelength scan related commands
% Scan start wavelength (nm)
addCommand(this, 'scan_start_wl', 'SOURce:WAVE:START', ...
'format', '%e', ...
'info', '(nm)');
% Scan stop wavelength (nm)
addCommand(this, 'scan_stop_wl', 'SOURce:WAVE:STOP', ...
'format', '%e', ...
'info', '(nm)');
% Scan speed (nm/s)
addCommand(this, 'scan_speed', 'SOURce:WAVE:SLEW:FORWard', ...
'format', '%e', ...
'info', '(nm/s)');
% Maximum scan speed (nm/s)
addCommand(this, 'scan_speed_max', 'SOURce:WAVE:MAXVEL', ...
'format', '%e', ...
'info', '(nm/s)', ...
'access', 'r');
end
end
methods (Access = public)
function openComm(this)
% Opening a single device is not supported by Newport Usb
% Driver, so open all the devices of the given type
OpenDevices(this.UsbComm.Usb, hex2num('100A'));
end
% Query textual command
function result = queryString(this, str)
try
result = query(this.UsbComm, this.address, str);
catch ME
try
% Attempt re-opening communication
openComm(this);
result = query(this.UsbComm, this.address, str);
catch
rethrow(ME);
end
end
end
% Redefine queryStrings of MyScpiInstrument
function res_list = queryStrings(this, varargin)
if ~isempty(varargin)
n_cmd = length(varargin);
res_list = cell(n_cmd,1);
% Query commands one by one as sending one query seems
% to sometimes give errors if the string is very long
for i = 1:n_cmd
cmd = [varargin{i},';'];
res_list{i} = queryString(this, cmd);
end
else
res_list = {};
end
end
% Writing is done by sending a command and querying its status.
% Still, redefine writeStrings of MyScpiInstrument for consistency
% and clarity.
function stat = writeString(this, str)
stat = queryString(this, str);
end
function stat = writeStrings(this, varargin)
stat = queryStrings(this, varargin{:});
end
%% Laser power and scan control functions
function stat = setMaxOutPower(this)
% Depending on if the laser in the constat power or current
% mode, set value to max
if this.const_power
stat = queryString(this, 'SOURce:POWer:DIODe MAX;');
else
stat = queryString(this, 'SOURce:CURRent:DIODe MAX;');
end
end
% Returns minimum and maximum wavelengths of the laser. There does
% not seem to be a more direct way of doing this with TLB6700
% other than setting and then reading the min/max values.
function [wl_min, wl_max] = readMinMaxWavelength(this)
tmp = this.scan_start_wl;
% Read min wavelength of the laser
writeStrings(this, 'SOURce:WAVE:START MIN');
resp = queryStrings(this, 'SOURce:WAVE:START?');
wl_min = str2double(resp{1});
% Read max wavelength of the laser
writeStrings(this, 'SOURce:WAVE:START MAX');
resp = queryStrings(this, 'SOURce:WAVE:START?');
wl_max = str2double(resp{1});
% Return scan start to its original value
this.scan_start_wl = tmp;
end
function configSingleScan(this)
% Configure:
% Do not switch the laser off during the backward scan,
% Perform a signle scan,
% Return at maximum speed
writeStrings(this,'SOURce:WAVE:SCANCFG 0', ...
'SOURce:WAVE:DESSCANS 1', ...
'SOURce:WAVE:SLEW:RETurn MAX');
end
function startScan(this)
writeStrings(this, 'OUTPut:SCAN:START');
end
function stopScan(this)
writeStrings(this, 'OUTPut:SCAN:STOP');
end
end
end
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