1. A method to control an optical transmitter that provides a wavelength tunable laser diode (tunable LD), a controller, and a memory look-up-table (LUT), the tunable LD integrally having a sampled grating distributed feedback (SG-DFB) region and a chirped sampled grating distributed Bragg reflector (CSG-DBR) region including at least three segments each having a diffraction grating and a space neighbor to the diffraction grating, each of segments having a heater and an optical length satisfying a relation of:
L1=L3+(L3\u2212L2)\xb7K,
where L1 to L3 are respective optical lengths and K is a constant of 0.3<=K<=0.7, the method comprising steps of:
evaluating parameters to define an emission wavelength of the tunable LD, the parameters including currents supplied to respective heaters, optimum offset power supplied to the heater in the first segment, and an operating temperature of the tunable LD;
storing the parameters to the memory LUT; and
practically operating the tunable LD by performing steps of,
receiving a target emission wavelength at which the tunable LD emit laser light,
reading parameters corresponding to the target emission wavelength from the memory LUT, and
controlling respective elements based on the parameters,
wherein the step of evaluating the parameters includes steps of,
varying power, P1 to P3, supplied to respective heaters based a relation of,
P1=P3\xb7Rth3Rth1+(P2\xb7Rth2Rth1\u2212P3\xb7Rth3Rth1)+offset,
where Rth1 to Rth3 are thermal resistance of respective heaters and offset is offset power supplied to the heater in the first segment;
measuring an emission wavelength and a side mode suppression ratio (SMSR) at the emission wavelength for the offset power;
evaluating a wavelength tunable range of the tunable LD, where the wavelength tunable range is a range the SMSR exceeds a preset value;
iterating the steps of varying power, measuring the emission wavelength and the SMSR, and the evaluating the wavelength tunable range as varying the offset;
determining the optimum offset power at which the wavelength tunable range becomes a maximum.
2. The method of claim 1,
wherein the step of evaluating the parameters further includes steps of:
measuring the emission wavelength as varying the power, P1 to P3, supplied to the heaters under the relation of:
P1=P3\xb7Rth3Rth1+(P2\xb7Rth2Rth1\u2212P3\xb7Rth3Rth1)+optimum_offset;
storing the parameters of P1 to P3, the optimum_offset as the optimum offset power, and the emission wavelength in the memory LUT.
3. The method of claim 2,
wherein the tunable LD further includes a sampled grating distributed feedback (SG-DFB) region neighbor to the CSG-DBR region, the SG-DFB region interacting with the CSG-DBR region to determine the emission wavelength of the tunable LD,
wherein the first segment in the CSG-DBR region is provided closest to the SG-DFB region compared with the second segment and the third segment.
4. The method of claim 3,
wherein the CSG-DBR region provides a first number of the first segments, a second number of the second segments, and a third number of the third segments, the first number being greater than an average of the second number and the third number.
5. The method of claim 3,
wherein the tunable LD further includes a semiconductor optical amplifier (SOA) region to amplify light generated in the SG-DFB region, and
wherein the step of evaluating parameters further includes steps of:
determining a current supplied to the SOA region for obtaining preset power of the laser light output from the tunable LD, and
storing the current to the memory LUT.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An adhesive cover for covering a surface of a device, comprising;
a base layer comprising vinyl or polyolefin;
a primer layer applied to a surface of the base layer;
a print layer applied to the primer layer, wherein the print layer comprises a design, wherein the primer layer improves adhesion of the print layer to the base layer;
a top layer comprising an over laminate and applied over the print layer; and
a bottom layer adhered to the base layer comprising an adhesive configured to adhere the adhesive cover to a device.
2. The adhesive cover of claim 1, wherein the base layer is corona treated.
3. The adhesive cover of claim 1, wherein the print layer is applied to the primer layer by a digital printer.
4. The adhesive cover of claim 1, wherein the print layer is applied to the primer layer by a silk screen.
5. The adhesive cover of claim 1, wherein the print layer comprises an ink selected from a group consisting of a metal ink and a glow-in-the-dark ink.
6. The adhesive cover of claim 1, wherein the print layer is applied to the primer layer by etching.
7. The adhesive cover of claim 1, wherein the print layer is applied to the primer layer by chemically burning the design into the primer layer.
8. The adhesive cover of claim 1, wherein the adhesive cover has a shape that facilitates adhering the cover to one or more sides of the device.
9. The adhesive cover of claim 1, wherein the adhesive cover comprises one or more apertures, tear away sections, punch out sections, peel away sections or a combination thereof.
10. The adhesive cover of claim 9 wherein the one or more apertures, the tear away sections, the punch out sections, the peel away sections or the combination thereof are each configured to form an opening in a portion of the adhesive cover, the opening configured to reveal a portion of the surface of the device therethrough.
11. The adhesive cover of claim 1, wherein the design comprises one or more customized colors, text, names, company brands, slogans, patterns, images, graphics, photographs, logos, advertisements, or a combination thereof.
12. The adhesive cover of claim 1, further comprising one or more decorative pieces affixed to an outer surface of the adhesive cover.
13. The adhesive cover of claim 1, further comprising a pre-printed pattern adapted to facilitate placement of decorative pieces on the adhesive cover.
14. The adhesive cover of claim 13, wherein the pre-printed pattern comprises a plurality of dots, each dot indicating a location for a user to place a decorative piece.
15. The adhesive cover of claim 1, wherein the top layer further comprises a resin dome that provides a raised appearance to the top layer of the adhesive cover.
16. The adhesive cover of claim 1, further comprising an adhesive layer between the print layer and the top layer to allow the top layer to be applied over the print layer.
17. The adhesive cover of claim 1, wherein the bottom layer has a pattern formed therein and configured to channel air out from underneath the adhesive cover when the adhesive cover is applied to the device.
18. The adhesive cover of claim 1 further comprising a release liner applied to the bottom layer.
19. An adhesive cover capable of adhering to a surface of a device, comprising:
a first layer comprising an adhesive configured to adhere the adhesive cover to a device;
a second layer comprising a fabric material; and
a third layer sandwiched between the first layer and the second layer, the third layer comprising a material that provides stiffness to the adhesive cover,
wherein the adhesive cover has a shape that facilitates adhering the adhesive cover to one or more sides of the device.
20. The adhesive cover of claim 19, wherein the fabric material comprises a flock transfer material.
21. The adhesive cover of claim 19, wherein a design is applied to an outer surface of the second layer.
22. The adhesive cover of claim 21, wherein the design was applied to the second layer via screen-printing.
23. The adhesive cover of claim 21, wherein the design was applied to the second layer via a digital printer.
24. The adhesive cover of claim 19, the second layer is an outwardly exposed layer not to be overlaminated.
25. An adhesive cover capable of adhering to a surface of a device, comprising:
a first top layer having a design applied to an underside thereof;
a second layer adhered to the underside of the first top layer after the design has been applied to the underside of the first top layer; and
a third layer adhered to the second layer opposite the first top layer, the third layer configured to adhere the adhesive cover to a device,
wherein the adhesive cover has a shape that facilitates adhering the adhesive cover to one or more sides of the device.
26. The adhesive cover of claim 25, wherein the design is applied to the first top layer via a digital printer.
27. The adhesive cover of claim 25, wherein the design is applied to the first top layer via a silk screen.
28. The adhesive cover of claim 25, wherein the third layer comprises a non-permanent adhesive and a release liner.
29. The adhesive cover of claim 25, wherein the first top layer further comprises a primer layer, wherein the primer layer facilitates application of the design to the underside.
30. The adhesive cover of claim 25, further comprising an adhesive layer sandwiched between the first top layer and the second layer.
31. A method of making an adhesive cover for covering a surface of a device, comprising:
obtaining a base layer comprising vinyl or polyolefin and having a first surface and a second surface, the first surface having a first adhesive layer applied thereto and a release liner applied to the first adhesive layer;
applying a primer layer to the second surface of the base layer;
applying a print layer to the primer layer, wherein the print layer comprises a design; and
applying a top laminate layer to the print layer to laminate the adhesive cover.
32. The method of claim 31 further comprising:
corona treating the second surface of the base layer prior to applying the primer layer.
33. The method of claim 32 further comprising:
corona treating the print layer prior to applying the top laminate layer.
34. The method of claim 31 wherein the applying the top laminate layer comprises:
applying a second adhesive layer to the top laminate layer; and
applying the second adhesive layer to the print layer.